Remove unused class RedPhoneEvent.

app/src/main/java/org/thoughtcrime/securesms/events/RedPhoneEvent.java

@@ -1,51 +0,0 @@
-package org.thoughtcrime.securesms.events;
-
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-
-import org.thoughtcrime.securesms.recipients.Recipient;
-
-public class RedPhoneEvent {
-
-  public enum Type {
-    CALL_CONNECTED,
-    WAITING_FOR_RESPONDER,
-    SERVER_FAILURE,
-    PERFORMING_HANDSHAKE,
-    HANDSHAKE_FAILED,
-    CONNECTING_TO_INITIATOR,
-    CALL_DISCONNECTED,
-    CALL_RINGING,
-    SERVER_MESSAGE,
-    RECIPIENT_UNAVAILABLE,
-    INCOMING_CALL,
-    OUTGOING_CALL,
-    CALL_BUSY,
-    LOGIN_FAILED,
-    CLIENT_FAILURE,
-    DEBUG_INFO,
-    NO_SUCH_USER
-  }
-
-  private final @NonNull  Type      type;
-  private final @NonNull  Recipient recipient;
-  private final @Nullable String    extra;
-
-  public RedPhoneEvent(@NonNull Type type, @NonNull Recipient recipient, @Nullable String extra) {
-    this.type      = type;
-    this.recipient = recipient;
-    this.extra     = extra;
-  }
-
-  public @NonNull Type getType() {
-    return type;
-  }
-
-  public @NonNull Recipient getRecipient() {
-    return recipient;
-  }
-
-  public @Nullable String getExtra() {
-    return extra;
-  }
-}