Remove temporary 'target' gatekeeper for downstream

Related to:
https://chrome-internal-review.googlesource.com/c/clank/internal/apps/+/1685369
https://chromium-review.googlesource.com/c/chromium/src/+/1762699

Bug: 995940
Change-Id: I3cc34fad155fbe96fcedc1ca7166d5b3adceb90b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1764800Reviewed-by: Tibor Goldschwendt <tiborg@chromium.org>
Commit-Queue: Fred Mello <fredmello@chromium.org>
Cr-Commit-Position: refs/heads/master@{#689440}

components/module_installer/android/BUILD.gn

@@ -32,14 +32,6 @@ android_library("module_installer_java") {
   jacoco_never_instrument = true
 }
 
-# Temporary java_group so that /clank (downstream) doesn't break
-# Will be removed as soon as the downstream CL lands
-java_group("module_installer_stub_java") {
-  deps = [
-    ":module_installer_java",
-  ]
-}
-
 android_library("module_installer_test_java") {
   testonly = true
   java_files = [ "javatests/src/org/chromium/components/module_installer/ModuleInstallerRule.java" ]