third_party/protobuf: Update to HEAD (f52e188fe4)

third_party/protobuf/php/ext/google/protobuf/test.php

Index: third_party/protobuf/php/ext/google/protobuf/test.php
diff --git a/third_party/protobuf/php/ext/google/protobuf/test.php b/third_party/protobuf/php/ext/google/protobuf/test.php
deleted file mode 100644
index 6bbadd48b18eaf0ea5194ab22d6faa41abe7bcdb..0000000000000000000000000000000000000000
--- a/third_party/protobuf/php/ext/google/protobuf/test.php
+++ /dev/null
@@ -1,15 +0,0 @@
-<?php
-
-
-namespace Google\Protobuf;
-
-$pool = get_generated_pool();
-$pool->addMessage("TestMessage")
-    ->optional("optional_int32_a", "int32", 1)
-    ->optional("optional_int32_b", "int32", 2)
-    ->finalizeToPool()
-    ->finalize();
-
-$test_message = new \TestMessage();
-
-?>