Clean up folly tests.

Summary: Clean up and remove unecessary gflags use.

Reviewed By: yfeldblum

Differential Revision: D2795904

fb-gh-sync-id: 99cccb4dc32a051b3d552b72cbc9243e20ba8127

folly/test/FormatTest.cpp

@@ -16,7 +16,6 @@
 
 #include <folly/Format.h>
 
-#include <gflags/gflags.h>
 #include <gtest/gtest.h>
 
 #include <string>
@@ -508,9 +507,3 @@ TEST(Format, Extending) {
                        "another formatter"),
             "Extending {a {formatter}} in {another formatter}");
 }
-
-int main(int argc, char *argv[]) {
-  testing::InitGoogleTest(&argc, argv);
-  gflags::ParseCommandLineFlags(&argc, &argv, true);
-  return RUN_ALL_TESTS();
-}