[test] Fix -Wunused-variable in rC343665

llvm-svn: 343721

clang/unittests/ASTMatchers/Dynamic/ParserTest.cpp

@@ -183,7 +183,7 @@ TEST(ParserTest, ParseMatcher) {
 
 TEST(ParserTest, ParseComment) {
   MockSema Sema;
-  const uint64_t ExpectedFoo = Sema.expectMatcher("Foo");
+  Sema.expectMatcher("Foo");
   Sema.parse(" Foo() # Bar() ");
   for (const auto &E : Sema.Errors) {
     EXPECT_EQ("", E);