Update src/tools/compiletest/src/runtest.rs

Co-authored-by: León Orell Valerian Liehr <me@fmease.dev>

Author: chenyukang

src/tools/compiletest/src/runtest.rs

@@ -885,7 +885,7 @@ impl<'test> TestCx<'test> {
                     .find(|flag| flag.contains("--error-format=human"))
                 {
                     let msg = format!(
-                        "tests with compile flags `{}` should not have annotation such as `//~ ERROR` and `//~ WARN` for JSON output.",
+                        "tests with compile flag `{}` should not have error annotations such as `//~ ERROR`",
                         human_format
                     ).color(Color::Red);
                     writeln!(self.stdout, "{}", msg);