builder: remove outdated tcc error (#15833)

This was introduced when we enabled the GC by default,as a suggestion
for resolving C errors caused by the user having an outdated TCC clone.
However, now that several months have passed, it is very unlikely that
people still have out-of-date copies of TCC, and instead it is more likely
that this error message is hiding the true cause of some C errors unrelated
to TCC or the GC.

Author: spaceface777

vlib/v/builder/cc.v

@@ -60,14 +60,6 @@ fn (mut v Builder) post_process_c_compiler_output(res os.Result) {
 		}
 		return
 	}
-	if res.exit_code != 0 && v.pref.gc_mode != .no_gc && res.output.contains('libgc.a')
-		&& !v.pref.is_o {
-		$if windows {
-			verror(r'Your V installation may be out-of-date. Try removing `thirdparty\tcc\` and running `.\make.bat`')
-		} $else {
-			verror('Your V installation may be out-of-date. Try removing `thirdparty/tcc/` and running `make`')
-		}
-	}
 	for emsg_marker in [builder.c_verror_message_marker, 'error: include file '] {
 		if res.output.contains(emsg_marker) {
 			emessage := res.output.all_after(emsg_marker).all_before('\n').all_before('\r').trim_right('\r\n')