Remove unused interface RedPhoneCallTypes.

app/src/main/java/org/thoughtcrime/securesms/util/RedPhoneCallTypes.java

@@ -1,23 +0,0 @@
-/**
- * Copyright (C) 2011 Whisper Systems
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-package org.thoughtcrime.securesms.util;
-
-public interface RedPhoneCallTypes {
-  public static final int INCOMING = 1023;
-  public static final int OUTGOING = 1024;
-  public static final int MISSED   = 1025;
-}