Fix unused parameters and variables

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@290459 91177308-0d34-0410-b5e6-96231b3b80d8

test/std/re/re.alg/re.alg.match/awk.pass.cpp

@@ -617,11 +617,12 @@ int main()
     }
     std::locale::global(std::locale(LOCALE_cs_CZ_ISO8859_2));
 */    {
+    /*
         std::cmatch m;
         const char s[] = "m";
-       /* assert(std::regex_match(s, m,*/ std::regex("[a[=M=]z]"/*,
-                                                 std::regex_constants::awk*/);//));
-/*        assert(m.size() == 1);
+        assert(std::regex_match(s, m, std::regex("[a[=M=]z]",
+                                                 std::regex_constants::awk);
+       assert(m.size() == 1);
         assert(!m.prefix().matched);
         assert(m.prefix().first == s);
         assert(m.prefix().second == m[0].first);

test/std/re/re.alg/re.alg.search/grep.pass.cpp

@@ -37,6 +37,8 @@ extern "C" void LLVMFuzzerTestOneInput(const char *data)
         }
         catch (std::regex_error &) {}
     }
+#else
+    ((void)data);
 #endif
 }