Android: Delete chrome_public_bundle target

We are far away from shipping pre-L bundles, so this target is not yet
worth maintaining.

Change-Id: I6f2f44782579716ecb73e3014ecd1d7f27571717
Reviewed-on: https://chromium-review.googlesource.com/c/1471218Reviewed-by: Tibor Goldschwendt <tiborg@chromium.org>
Reviewed-by: David Turner <digit@chromium.org>
Commit-Queue: Andrew Grieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/master@{#632035}

chrome/android/BUILD.gn

@@ -1507,12 +1507,6 @@ chrome_public_apk_or_module_tmpl("chrome_modern_public_apk") {
   is_modern = true
 }
 
-chrome_public_apk_or_module_tmpl("chrome_public_base_bundle_module") {
-  target_type = "android_app_bundle_module"
-  is_base_module = true
-  module_name = "ChromePublicBase"
-}
-
 chrome_public_apk_or_module_tmpl("chrome_modern_public_base_bundle_module") {
   target_type = "android_app_bundle_module"
   module_name = "ChromeModernPublicBase"
@@ -1874,22 +1868,6 @@ if (modularize_vr) {
   }
 }
 
-# Chrome Android application bundles.
-android_app_bundle("chrome_public_bundle") {
-  bundle_name = "ChromePublic"
-  base_module_target = ":chrome_public_base_bundle_module"
-  command_line_flags_file = "chrome-command-line"
-  if (!is_java_debug) {
-    proguard_enabled = true
-  }
-
-  # Signing is very slow, only do that for official builds.
-  sign_bundle = is_official_build
-
-  enable_language_splits = enable_chrome_language_splits
-  compress_shared_libraries = true
-}
-
 android_app_bundle("chrome_modern_public_bundle") {
   bundle_name = "ChromeModernPublic"
   base_module_target = ":chrome_modern_public_base_bundle_module"