Reverts third_party/protobuf: Update to HEAD (f52e188fe4)

third_party/protobuf/jenkins/buildcmds/pull_request_32.sh

Index: third_party/protobuf/jenkins/buildcmds/pull_request_32.sh
diff --git a/third_party/protobuf/jenkins/buildcmds/pull_request_32.sh b/third_party/protobuf/jenkins/buildcmds/pull_request_32.sh
deleted file mode 100755
index bf0fb7ffe3c8cfa00a129b7cdb952f90127a4490..0000000000000000000000000000000000000000
--- a/third_party/protobuf/jenkins/buildcmds/pull_request_32.sh
+++ /dev/null
@@ -1,16 +0,0 @@
-#!/bin/bash
-#
-# This is the top-level script we give to Jenkins as the entry point for
-# running the "pull request 32" project:
-#
-#   https://grpc-testing.appspot.com/view/Protocol%20Buffers/job/Protocol%20Buffers%20Pull%20Request%2032/
-#
-# This script selects a specific Dockerfile (for building a Docker image) and
-# a script to run inside that image.  Then we delegate to the general
-# build_and_run_docker.sh script.
-
-export DOCKERFILE_DIR=jenkins/docker32
-export DOCKER_RUN_SCRIPT=jenkins/pull_request_in_docker.sh
-export OUTPUT_DIR=testoutput
-export TEST_SET="php_all_32"
-./jenkins/build_and_run_docker.sh