Revert of Add tab persistence support for CustomTabs.

base/android/java/src/org/chromium/base/ApiCompatibilityUtils.java

Index: base/android/java/src/org/chromium/base/ApiCompatibilityUtils.java
diff --git a/base/android/java/src/org/chromium/base/ApiCompatibilityUtils.java b/base/android/java/src/org/chromium/base/ApiCompatibilityUtils.java
index 9680600d30206625b3593563109f5ade54a3c0f4..e552fe002b5c23ef1b20f8a5ecfe6912d0b86dac 100644
--- a/base/android/java/src/org/chromium/base/ApiCompatibilityUtils.java
+++ b/base/android/java/src/org/chromium/base/ApiCompatibilityUtils.java
@@ -44,17 +44,6 @@
     }
 
     /**
-     * @see Long#compare(long, long)
-     */
-    public static int compareLong(long lhs, long rhs) {
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
-            return Long.compare(lhs, rhs);
-        } else {
-            return lhs < rhs ? -1 : (lhs == rhs ? 0 : 1);
-        }
-    }
-
-    /**
      * Returns true if view's layout direction is right-to-left.
      *
      * @param view the View whose layout is being considered