diff --git a/third_party/gflags_test/gflags_test.cc b/third_party/gflags_test/gflags_test.cc
deleted file mode 100644
index 53286e7e5be062cf66b37d07047b173ea831e6c4..0000000000000000000000000000000000000000
--- a/third_party/gflags_test/gflags_test.cc
+++ /dev/null
@@ -1,33 +0,0 @@
-#include <iostream>
-#include <string>
-
-#include "gflags/gflags.h"
-#include "gtest/gtest.h"
-
-DEFINE_bool(verbose, false, "Display program name before message");
-DEFINE_string(message, "Hello world!", "Message to print");
-
-static bool IsNonEmptyMessage(const char *flagname, const std::string &value) {
-  return value[0] != '\0';
-}
-DEFINE_validator(message, &IsNonEmptyMessage);
-
-namespace third_party {
-namespace gflags_test {
-
-TEST(GflagsTest, ParseAndPrint) {
-  gflags::SetUsageMessage("some usage message");
-  gflags::SetVersionString("1.0.0");
-  int argc = 1;
-  char program_name[] = "gflags_test";
-  char **argv = new char *[2];
-  argv[0] = program_name;
-  argv[1] = NULL;
-  gflags::ParseCommandLineFlags(&argc, reinterpret_cast<char ***>(&argv), true);
-  EXPECT_EQ("gflags_test", std::string(gflags::ProgramInvocationShortName()));
-  EXPECT_EQ("Hello world!", FLAGS_message);
-  gflags::ShutDownCommandLineFlags();
-}
-
-}  // namespace gflags_test
-}  // namespace third_party
diff --git a/third_party/glog_test/glog_test.cc b/third_party/glog_test/glog_test.cc
deleted file mode 100644
index f1d737d625d25e8675f636075876903c42881a35..0000000000000000000000000000000000000000
--- a/third_party/glog_test/glog_test.cc
+++ /dev/null
@@ -1,7 +0,0 @@
-#include <iostream>
-#include <string>
-
-#include "glog/logging.h"
-#include "gtest/gtest.h"
-
-TEST(GlogTest, Logging) { LOG(INFO) << "Hello world"; }
diff --git a/third_party/protobuf_test/example.proto b/third_party/protobuf_test/example.proto
deleted file mode 100644
index 6a7eada9c14a9df5d3ef8971b636c14a11da3d11..0000000000000000000000000000000000000000
--- a/third_party/protobuf_test/example.proto
+++ /dev/null
@@ -1,7 +0,0 @@
-syntax = "proto3";
-
-package third_party.protobuf_test;
-
-message Greeting {
-  string name = 1;
-}
diff --git a/third_party/protobuf_test/example_lib.cc b/third_party/protobuf_test/example_lib.cc
deleted file mode 100644
index ced377bc0a17dde31c5c853dec1a852fa0be7223..0000000000000000000000000000000000000000
--- a/third_party/protobuf_test/example_lib.cc
+++ /dev/null
@@ -1,9 +0,0 @@
-#include "third_party/protobuf_test/example_lib.h"
-
-namespace third_party {
-namespace protobuf_test {
-
-std::string get_greet(const Greeting& who) { return "Hello " + who.name(); }
-
-}  // namespace protobuf_test
-}  // namespace thrid_party
diff --git a/third_party/protobuf_test/example_lib.h b/third_party/protobuf_test/example_lib.h
deleted file mode 100644
index 516326e812e19eb162f5392b519904a65c66c660..0000000000000000000000000000000000000000
--- a/third_party/protobuf_test/example_lib.h
+++ /dev/null
@@ -1,13 +0,0 @@
-#pragma once
-
-#include "third_party/protobuf_test/example.pb.h"
-
-#include <string>
-
-namespace third_party {
-namespace protobuf_test {
-
-std::string get_greet(const Greeting &who);
-
-}  // namespace protobuf_test
-}  // namespace third_party
diff --git a/third_party/protobuf_test/example_lib_test.cc b/third_party/protobuf_test/example_lib_test.cc
deleted file mode 100644
index 6229f56e6026908fff991765bd6bdaff6f8236ac..0000000000000000000000000000000000000000
--- a/third_party/protobuf_test/example_lib_test.cc
+++ /dev/null
@@ -1,15 +0,0 @@
-#include "third_party/protobuf_test/example_lib.h"
-
-#include "gtest/gtest.h"
-
-namespace third_party {
-namespace protobuf_test {
-
-TEST(ProtobufTest, GetGreet) {
-  Greeting g;
-  g.set_name("Paddle");
-  EXPECT_EQ("Hello Paddle", get_greet(g));
-}
-
-}  // namespace protobuf_test
-}  // namespace third_party