Remove fmt/folly.h and clean up core API

test/CMakeLists.txt

@@ -86,7 +86,6 @@ endfunction()
 
 add_fmt_test(assert-test)
 add_fmt_test(gtest-extra-test)
-add_fmt_test(folly-test)
 add_fmt_test(format-test)
 add_fmt_test(format-impl-test)
 add_fmt_test(ostream-test)

test/folly-test.cc

@@ -1,14 +0,0 @@
-// Formatting library for C++ - folly::StringPiece formatter tests
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#include <fmt/folly.h>
-#include "gtest.h"
-
-TEST(FollyTest, FormatStringPiece) {
-  EXPECT_EQ(fmt::format("{}", "foo"), "foo");
-  EXPECT_EQ(fmt::format("{:>5}", "foo"), "  foo");
-}