Remove unused chrome_junit_test_support target

BUG=966644

Change-Id: I2d418578e03e42f4f6e638f1c21afb71ba202cce
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1917750Reviewed-by: David Trainor <dtrainor@chromium.org>
Commit-Queue: Theresa  <twellington@chromium.org>
Cr-Commit-Position: refs/heads/master@{#715441}

chrome/android/BUILD.gn

@@ -610,23 +610,6 @@ java_cpp_template("resource_id_javagen") {
   ]
 }
 
-# TODO(twellington): Remove after downstream patch to remove as dependency cycles through.
-android_library("chrome_junit_test_support") {
-  # Skip platform checks since Robolectric depends on requires_android targets.
-  bypass_platform_checks = true
-  testonly = true
-  java_files = [
-    "junit/src/org/chromium/chrome/test/support/DisableHistogramsRule.java",
-  ]
-
-  deps = [
-    "//base:base_java",
-    "//third_party/junit",
-    "//third_party/mockito:mockito_java",
-    "//third_party/robolectric:robolectric_all_java",
-  ]
-}
-
 junit_binary("chrome_junit_tests") {
   # From java_sources.gni.
   java_files = chrome_junit_test_java_sources