remove all ie7 conditionals and mixins

less/bootstrap.less

@@ -36,7 +36,7 @@
 // Components: Buttons & Alerts
 @import "buttons.less";
 @import "button-groups.less";
-@import "alerts.less"; // Note: alerts share common CSS with buttons and thus have styles in buttons.less
+@import "alerts.less";
 
 // Components: Nav
 @import "navs.less";

less/breadcrumbs.less

@@ -11,7 +11,6 @@
   .border-radius(4px);
   li {
     display: inline-block;
-    .ie7-inline-block();
     text-shadow: 0 1px 0 @white;
   }
   .divider {

less/button-groups.less

@@ -7,11 +7,9 @@
 .btn-group {
   position: relative;
   display: inline-block;
-  .ie7-inline-block();
   font-size: 0; // remove as part 1 of font-size inline-block hack
   vertical-align: middle; // match .btn alignment given font-size hack above
   white-space: nowrap; // prevent buttons from wrapping when in tight spaces (e.g., the table on the tests page)
-  .ie7-restore-left-whitespace();
 }
 
 // Space out series of button groups
@@ -215,8 +213,7 @@
 // ----------------------
 
 .btn-group-vertical {
-  display: inline-block; // makes buttons only take up the width they need
-  .ie7-inline-block();
+  display: inline-block; // Make buttons only take up the width they need
 }
 .btn-group-vertical .btn {
   display: block;

less/buttons.less

@@ -9,21 +9,17 @@
 // Core
 .btn {
   display: inline-block;
-  .ie7-inline-block();
   padding: 4px 12px;
   margin-bottom: 0; // For input.btn
   font-size: @baseFontSize;
   line-height: @baseLineHeight;
-  *line-height: @baseLineHeight;
   text-align: center;
   vertical-align: middle;
   cursor: pointer;
   .buttonBackground(@btnBackground, @btnBackgroundHighlight, @grayDark, 0 1px 1px rgba(255,255,255,.75));
   border: 1px solid @btnBorder;
-  *border: 0; // Remove the border to prevent IE7's black border on input:focus
   border-bottom-color: darken(@btnBorder, 10%);
   .border-radius(4px);
-  .ie7-restore-left-whitespace(); // Give IE7 some love
   .box-shadow(~"inset 0 1px 0 rgba(255,255,255,.2), 0 1px 2px rgba(0,0,0,.05)");
 
   // Hover state
@@ -31,7 +27,6 @@
     color: @grayDark;
     text-decoration: none;
     background-color: darken(@white, 10%);
-    *background-color: darken(@white, 15%); /* Buttons in IE7 don't get borders, so darken on hover */
     background-position: 0 -15px;
 
     // transition is only when going to hover, otherwise the background
@@ -183,22 +178,6 @@ input[type="submit"].btn {
     border: 0;
   }
 
-  // IE7 has some default padding on button controls
-  *padding-top: 3px;
-  *padding-bottom: 3px;
-
-  &.btn-large {
-    *padding-top: 7px;
-    *padding-bottom: 7px;
-  }
-  &.btn-small {
-    *padding-top: 3px;
-    *padding-bottom: 3px;
-  }
-  &.btn-mini {
-    *padding-top: 1px;
-    *padding-bottom: 1px;
-  }
 }
 
 

less/code.less

@@ -33,7 +33,7 @@ pre {
   white-space: pre;
   white-space: pre-wrap;
   background-color: #f5f5f5;
-  border: 1px solid #ccc; // fallback for IE7-8
+  border: 1px solid #ccc; // IE8 fallback
   border: 1px solid rgba(0,0,0,.15);
   .border-radius(4px);
 

less/dropdowns.less

@@ -8,10 +8,6 @@
 .dropdown {
   position: relative;
 }
-.dropdown-toggle {
-  // The caret makes the toggle a bit too tall in IE7
-  *margin-bottom: -3px;
-}
 .dropdown-toggle:active,
 .open .dropdown-toggle {
   outline: 0;
@@ -50,7 +46,7 @@
   margin: 2px 0 0; // override default ul
   list-style: none;
   background-color: @dropdownBackground;
-  border: 1px solid #ccc; // Fallback for IE7-8
+  border: 1px solid #ccc; // IE8 fallback
   border: 1px solid @dropdownBorder;
   *border-right-width: 2px;
   *border-bottom-width: 2px;
@@ -122,10 +118,6 @@
 // Open state for the dropdown
 // ---------------------------
 .open {
-  // IE7's z-index only goes to the nearest positioned ancestor, which would
-  // make the menu appear below buttons that appeared later on the page
-  *z-index: @zindexDropdown;
-
   & > .dropdown-menu {
     display: block;
   }

less/forms.less

@@ -135,7 +135,6 @@ input[type="color"],
 input[type="radio"],
 input[type="checkbox"] {
   margin: 4px 0 0;
-  *margin-top: 0; /* IE7 */
   margin-top: 1px \9; /* IE8-9 */
   line-height: normal;
   cursor: pointer;
@@ -155,8 +154,7 @@ input[type="checkbox"] {
 // Set the height of select and file controls to match text inputs
 select,
 input[type="file"] {
-  height: @inputHeight; /* In IE7, the height of the select element cannot be changed by height, only font-size */
-  *margin-top: 4px; /* For IE7, add top margin to align select with labels */
+  height: @inputHeight; /* In IE7, the height of the select element cannot be changed by height, only font-size. TODO: Check if this is still needed when dropping IE7 support */
   line-height: @inputHeight;
 }
 
@@ -403,7 +401,6 @@ select:focus:required:invalid {
 
 .help-inline {
   display: inline-block;
-  .ie7-inline-block();
   vertical-align: middle;
   padding-left: 5px;
 }
@@ -539,7 +536,7 @@ input.search-query {
   padding-right: 14px;
   padding-right: 4px \9;
   padding-left: 14px;
-  padding-left: 4px \9; /* IE7-8 doesn't have border-radius, so don't indent the padding */
+  padding-left: 4px \9; /* IE8 doesn't have border-radius, so don't indent the padding */
   margin-bottom: 0; // Remove the default margin on all inputs
   .border-radius(15px);
 }
@@ -582,7 +579,6 @@ input.search-query {
   .input-prepend,
   .input-append {
     display: inline-block;
-    .ie7-inline-block();
     margin-bottom: 0;
     vertical-align: middle;
   }
@@ -653,15 +649,7 @@ legend + .control-group {
   }
   // Move over all input controls and content
   .controls {
-    // Super jank IE7 fix to ensure the inputs in .input-append and input-prepend
-    // don't inherit the margin of the parent, in this case .controls
-    *display: inline-block;
-    *padding-left: 20px;
     margin-left: @horizontalComponentOffset;
-    *margin-left: 0;
-    &:first-child {
-      *padding-left: @horizontalComponentOffset;
-    }
   }
   // Remove bottom margin on block level help text since that's accounted for on .control-group
   .help-block {

less/navbar.less

@@ -11,10 +11,6 @@
   overflow: visible;
   margin-bottom: @baseLineHeight;
   color: @navbarText;
-
-  // Fix for IE7's bad z-indexing so dropdowns don't appear below content that follows the navbar
-  *position: relative;
-  *z-index: 2;
 }
 
 // Inner for background effects
@@ -450,7 +446,7 @@
       .transition(none);
       .placeholder(@navbarInverseSearchPlaceholderColor);
 
-      // Focus states (we use .focused since IE7-8 and down doesn't support :focus)
+      // Focus states (we use .focused since IE8 and down doesn't support :focus)
       &:focus,
       &.focused {
         padding: 5px 15px;

less/pagination.less

@@ -10,7 +10,6 @@
 .pagination ul {
   // Allow for text-based alignment
   display: inline-block;
-  .ie7-inline-block();
   // Reset default ul styles
   margin-left: 0;
   margin-bottom: 0;

less/reset.less

@@ -79,7 +79,7 @@ sub {
 img {
   /* Responsive images (ensure images don't scale beyond their parents) */
   max-width: 100%; /* Part 1: Set a maxium relative to the parent */
-  width: auto\9; /* IE7-8 need help adjusting responsive images */
+  width: auto\9; /* IE8 need help adjusting responsive images */
   height: auto; /* Part 2: Scale the height according to the width, otherwise you get stretching */
 
   vertical-align: middle;

less/sprites.less

@@ -19,7 +19,6 @@
   display: inline-block;
   width: 14px;
   height: 14px;
-  .ie7-restore-right-whitespace();
   line-height: 14px;
   vertical-align: text-top;
   background-image: url("@{iconSpritePath}");

less/tables.less

@@ -69,7 +69,6 @@ table {
 .table-bordered {
   border: 1px solid @tableBorder;
   border-collapse: separate; // Done so we can round those corners!
-  *border-collapse: collapse; // IE7 can't round corners anyway
   border-left: 0;
   .border-radius(4px);
   th,