fix: $meta can be called server side before app is initiated

src/server/$meta.js

@@ -1,4 +1,3 @@
-import { showWarningNotSupported } from '../shared/constants'
 import { getOptions } from '../shared/options'
 import { pause, resume } from '../shared/pausing'
 import refresh from '../client/refresh'
@@ -14,16 +13,6 @@ export default function _$meta(options = {}) {
    * @return {Object} - injector
    */
   return function $meta() {
-    if (!this.$root._vueMeta) {
-      return {
-        getOptions: showWarningNotSupported,
-        refresh: showWarningNotSupported,
-        inject: showWarningNotSupported,
-        pause: showWarningNotSupported,
-        resume: showWarningNotSupported
-      }
-    }
-
     return {
       getOptions: () => getOptions(options),
       refresh: _refresh.bind(this),

test/unit/plugin-server.test.js

@@ -11,26 +11,6 @@ describe('plugin', () => {
   beforeEach(() => jest.clearAllMocks())
   beforeAll(() => (Vue = loadVueMetaPlugin()))
 
-  test('not loaded when no metaInfo defined', () => {
-    const warn = jest.spyOn(console, 'warn').mockImplementation(() => {})
-
-    const instance = new Vue()
-    expect(instance.$meta).toEqual(expect.any(Function))
-
-    expect(instance.$meta().inject).toEqual(expect.any(Function))
-    expect(instance.$meta().refresh).toEqual(expect.any(Function))
-    expect(instance.$meta().getOptions).toEqual(expect.any(Function))
-
-    expect(instance.$meta().inject()).not.toBeDefined()
-    expect(warn).toHaveBeenCalledTimes(1)
-    expect(instance.$meta().refresh()).not.toBeDefined()
-    expect(warn).toHaveBeenCalledTimes(2)
-
-    instance.$meta().getOptions()
-    expect(warn).toHaveBeenCalledTimes(3)
-    warn.mockRestore()
-  })
-
   test('is loaded', () => {
     const instance = new Vue({ metaInfo: {} })
     expect(instance.$meta).toEqual(expect.any(Function))