Revert "[ADT] Enable set_difference() to be used on StringSet"

This reverts commit 0bddef79019a23ab14fcdb27028e55e484674c88, it was
causing ASan failures on the sanitizer bots:
http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux-fast/builds/32800

llvm-svn: 362823

1 files changed, 0 insertions, 43 deletions

diff --git a/llvm/unittests/ADT/StringSetTest.cpp b/llvm/unittests/ADT/StringSetTest.cpp
deleted file mode 100644
index 822fe52f191..00000000000
--- a/llvm/unittests/ADT/StringSetTest.cpp
+++ /dev/null
@@ -1,43 +0,0 @@
-//===- llvm/unittest/ADT/StringSetTest.cpp - StringSet unit tests ----------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/ADT/StringSet.h"
-#include "gtest/gtest.h"
-using namespace llvm;
-
-namespace {
-
-// Test fixture
-class StringSetTest : public testing::Test {};
-
-TEST_F(StringSetTest, IterSetKeys) {
-  StringSet<> Set;
-  Set.insert("A");
-  Set.insert("B");
-  Set.insert("C");
-  Set.insert("D");
-
-  auto Keys = to_vector<4>(Set.keys());
-  llvm::sort(Keys);
-
-  SmallVector<StringRef, 4> Expected = {"A", "B", "C", "D"};
-  EXPECT_EQ(Expected, Keys);
-}
-
-TEST_F(StringSetTest, InsertAndCountStringMapEntry) {
-  // Test insert(StringMapEntry) and count(StringMapEntry)
-  // which are required for set_difference(StringSet, StringSet).
-  StringSet<> Set;
-  StringMapEntry<StringRef> Element(1, "A");
-  Set.insert(Element);
-  size_t Count = Set.count(Element);
-  size_t Expected = 1;
-  EXPECT_EQ(Expected, Count);
-}
-
-} // end anonymous namespace