Remove unused utility API.

Test: TH
Bug: 146564366
Change-Id: I198cbd6e93335d8daaba42b20d5c28721be948f4

telephony/common/com/android/internal/telephony/util/TelephonyUtils.java

@@ -26,7 +26,6 @@ import android.content.pm.ResolveInfo;
 import android.os.Binder;
 import android.os.Bundle;
 import android.os.PersistableBundle;
-import android.os.RemoteException;
 import android.os.SystemProperties;
 import android.telephony.TelephonyManager;
 
@@ -74,11 +73,6 @@ public final class TelephonyUtils {
         return cur == null ? Collections.emptyList() : cur;
     }
 
-    /** Throws a {@link RuntimeException} that wrapps the {@link RemoteException}. */
-    public static RuntimeException rethrowAsRuntimeException(RemoteException remoteException) {
-        throw new RuntimeException(remoteException);
-    }
-
     /**
      * Returns a {@link ComponentInfo} from the {@link ResolveInfo},
      * or throws an {@link IllegalStateException} if not available.