fix(aio): remove unused `getExampleFilename` service

aio/transforms/examples-package/index.js

@@ -7,7 +7,6 @@ module.exports =
         .factory(require('./inline-tag-defs/example'))
         // .factory(require('./inline-tag-defs/exampleTabs'))
         .factory(require('./services/parseArgString'))
-        .factory(require('./services/getExampleFilename'))
         .factory(require('./services/example-map'))
         .factory(require('./file-readers/example-reader'))
         .factory(require('./services/region-parser'))

aio/transforms/examples-package/inline-tag-defs/example.js

@@ -14,7 +14,7 @@ var entities = require('entities');
  * @kind function
  */
 module.exports = function exampleInlineTagDef(
-    parseArgString, exampleMap, getExampleFilename, createDocMessage, log, collectExamples) {
+    parseArgString, exampleMap, createDocMessage, log, collectExamples) {
   return {
     name: 'example',
     description:

aio/transforms/examples-package/services/getExampleFilename.js

@@ -1,9 +0,0 @@
-module.exports = function getExampleFilename() {
-
-  function getExampleFilenameImpl(relativePath) {
-    return getExampleFilenameImpl.examplesFolder + relativePath;
-  }
-
-  getExampleFilenameImpl.examplesFolder = '@angular/examples/';
-  return getExampleFilenameImpl;
-};