Remove unused files

conn-lock-todo.txt

@@ -1,11 +0,0 @@
-Extract all locking state into a separate struct that will encapsulate locking and state change behavior.
-
-This struct should add or subsume at least the following:
-* alive
-* closingLock
-* ctxInProgress (though this may be restructured because it's possible a Tx may have a ctx and a query run in that Tx could have one)
-* busy
-* lock/unlock
-* Tx in-progress
-* Rows in-progress
-* ConnPool checked-out or checked-in - maybe include reference to conn pool

context-todo.txt

@@ -1,12 +0,0 @@
-Add more testing
-- stress test style
-- pgmock
-
-Add documentation
-
-Add PrepareContext
-Add context methods to ConnPool
-Add context methods to Tx
-Add context support database/sql
-
-Benchmark - possibly cache done channel on Conn