[libc][c11] implement ctime

remove `ctime` and `ctime_r` from `clang-tidy`

this will be done in llvm#107445

Author: zimirza

clang-tools-extra/clang-tidy/bugprone/UnsafeFunctionsCheck.cpp

@@ -42,7 +42,7 @@ static StringRef getReplacementFor(StringRef FunctionName,
     // Try to find a better replacement from Annex K first.
     StringRef AnnexKReplacementFunction =
         StringSwitch<StringRef>(FunctionName)
-	    .Cases("asctime", "asctime_r", "asctime_s", "ctime", "ctime_r")
+	    .Cases("asctime", "asctime_r", "asctime_s")
             .Case("gets", "gets_s")
             .Default({});
     if (!AnnexKReplacementFunction.empty())