Query Tiles : Cleanup FakeTileProvider

This CL deletes FakeTileProvider from java.

Bug: 1090140
Change-Id: I47c1e5a50ad8984aaf85d2f59605cef1756898d6
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2219389
Commit-Queue: Shakti Sahu <shaktisahu@chromium.org>
Reviewed-by: David Trainor <dtrainor@chromium.org>
Cr-Commit-Position: refs/heads/master@{#774727}

chrome/android/chrome_java_sources.gni

@@ -1348,7 +1348,6 @@ chrome_java_sources = [
   "java/src/org/chromium/chrome/browser/provider/ChromeBrowserProviderSuggestionsCursor.java",
   "java/src/org/chromium/chrome/browser/provider/SearchColumns.java",
   "java/src/org/chromium/chrome/browser/push_messaging/PushMessagingServiceObserver.java",
-  "java/src/org/chromium/chrome/browser/query_tiles/FakeTileProvider.java",
   "java/src/org/chromium/chrome/browser/query_tiles/QueryTileSection.java",
   "java/src/org/chromium/chrome/browser/query_tiles/QueryTileUtils.java",
   "java/src/org/chromium/chrome/browser/query_tiles/TileProviderFactory.java",