Fix build.

Change-Id: I3d4565487bdfd7cd41938fd44180de2ab6eaeb88
diff --git a/src/com/android/mail/ui/AbstractActivityController.java b/src/com/android/mail/ui/AbstractActivityController.java
index 7cc3286..9c8176b 100644
--- a/src/com/android/mail/ui/AbstractActivityController.java
+++ b/src/com/android/mail/ui/AbstractActivityController.java
@@ -64,11 +64,6 @@
 import com.android.mail.providers.UIProvider.FolderCapabilities;
 import com.android.mail.utils.LogUtils;
 import com.android.mail.utils.Utils;
-import com.google.android.gm.ConversationInfo;
-import com.google.android.gm.LabelOperations;
-import com.google.android.gm.provider.Gmail;
-import com.google.android.gm.provider.Label;
-import com.google.android.gm.provider.LabelManager;
 import com.google.common.collect.ImmutableList;
 import com.google.common.collect.Lists;
 import com.google.common.collect.Sets;