Revert "Export proguard.flags, manifest and sources for use by S..."

Revert submission 13183140-SettingsGoogle-bp

Reason for revert: b/177766209
Reverted Changes:
I73bef76ec:Add ArcSettings and SettingsGoogle to the legacy a...
I385629c5c:Build Settings-robo-testutils for use by SettingsG...
I863e1d658:Convert ArcSettings to Android.bp
If095bc39d:Convert SettingsGoogleRoboTests to Android.bp
I8d3f32cd4:Convert SettingsGoogle tests to Android.bp
I7ddeb985c:Convert SettingsGoogle to Android.bp
I3b8223e64:Export elmyra and columbus aidl files for Settings...
I3d2f042a9:Export proguard.flags, manifest and sources for us...

Change-Id: I9da85caeb3a53cf7ac3216c4b34985423b997fd2

Android.bp

@@ -93,21 +93,3 @@ android_library_import {
     name: "contextualcards",
     aars: ["libs/contextualcards.aar"],
 }
-
-filegroup {
-    name: "Settings_proguard_flags",
-    srcs: ["proguard.flags"],
-}
-
-// The sources for Settings need to be exposed to SettingsGoogle, etc.
-// so they can run the com.android.settingslib.search.IndexableProcessor
-// over all the sources together.
-filegroup {
-    name: "Settings_srcs",
-    srcs: ["src/**/*.java"],
-}
-
-filegroup {
-    name: "Settings_manifest",
-    srcs: ["AndroidManifest.xml"],
-}