Revert "Adding GCM support to the copresence component. The Copresence server can push directives (…

components/copresence/proto/push_message.proto

Index: components/copresence/proto/push_message.proto
diff --git a/components/copresence/proto/push_message.proto b/components/copresence/proto/push_message.proto
deleted file mode 100644
index 239e88525b11e853045ba146603b6ea6fe9b5a06..0000000000000000000000000000000000000000
--- a/components/copresence/proto/push_message.proto
+++ /dev/null
@@ -1,20 +0,0 @@
-syntax = "proto2";
-package copresence;
-option optimize_for = LITE_RUNTIME;
-import "data.proto";
-message PushMessage {
-  enum Type {
-    TYPE_UNKNOWN = 0;
-    SYNC_SETTINGS = 3;
-    OBTAIN_MAC = 5;
-    NOTIFY_MAC = 6;
-    TEST = 7;
-    REPORT = 8;
-  };
-  optional Type type = 1;
-  optional Report report = 9;
-}
-message Report {
-  repeated Directive directive = 1;
-  repeated SubscribedMessage subscribed_message = 2;
-}