Merge "Remove unused method from MatchAllNetworkSpecifier" am: 6a5d57c2ee

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/1560475

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I2ebaa439101d01b444606a6e0aab4582217224a9

core/java/android/net/MatchAllNetworkSpecifier.java

@@ -31,17 +31,6 @@ import android.os.Parcelable;
  */
 @SystemApi
 public final class MatchAllNetworkSpecifier extends NetworkSpecifier implements Parcelable {
-    /**
-     * Utility method which verifies that the ns argument is not a MatchAllNetworkSpecifier and
-     * throws an IllegalArgumentException if it is.
-     * @hide
-     */
-    public static void checkNotMatchAllNetworkSpecifier(NetworkSpecifier ns) {
-        if (ns instanceof MatchAllNetworkSpecifier) {
-            throw new IllegalArgumentException("A MatchAllNetworkSpecifier is not permitted");
-        }
-    }
-
     /** @hide */
     @Override
     public boolean canBeSatisfiedBy(NetworkSpecifier other) {