Removed keeps for unused member variables.

chrome/android/java/proguard.flags

Index: chrome/android/java/proguard.flags
diff --git a/chrome/android/java/proguard.flags b/chrome/android/java/proguard.flags
index a1751e9c18e25fb683731b13e5040135d4da799a..ab6a0db2572e12e13b9c186efa0a8bcde5786b8b 100644
--- a/chrome/android/java/proguard.flags
+++ b/chrome/android/java/proguard.flags
@@ -9,12 +9,6 @@
   *;
 }
 
-# Keep all the primitive and String constants for for the following two packages.
--keepclassmembers class com.google.android.apps.chrome.**,org.chromium.** {
-  !private static final % *;
-  !private static final java.lang.String *;
-}
-
 # Keep code annotated with the following annotations.
 -keep class com.google.android.apps.chrome.**,org.chromium.** {
   @**.AccessedByNative <fields>;