[Android] Remove unused Download resource target

Last references to this target have been cleaned up in:
https://crrev.com/i/3401020.

Bug: 1047896
Change-Id: I95047d97ba548ef71c982c62d266fc9fdcc9033b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2541563Reviewed-by: Mohamed Heikal <mheikal@chromium.org>
Commit-Queue: Natalie Chouinard <chouinard@chromium.org>
Cr-Commit-Position: refs/heads/master@{#828435}

chrome/android/BUILD.gn

@@ -251,12 +251,6 @@ if (enable_vr) {
   }
 }
 
-# TODO(chouinard): Remove this wrapper target after downstream dependencies on it are replaced.
-android_resources("chrome_download_java_resources") {
-  sources = []
-  deps = [ "//chrome/browser/download/android:java_resources" ]
-}
-
 android_library("app_hooks_java") {
   sources = [ app_hooks_impl ]
   deps = [ ":chrome_java" ]