fix check

src/frontend/src/handler/create_sql_function.rs

@@ -123,24 +123,6 @@ fn create_mock_udf_context(
     ret
 }
 
-/// Find the pattern for better hint display
-/// return the exact index where the pattern first appears
-fn find_target(input: &str, target: &str) -> Option<usize> {
-    // Regex pattern to find `target` not preceded or followed by an ASCII letter
-    // The pattern uses negative lookbehind (?<!...) and lookahead (?!...) to ensure
-    // the target is not surrounded by ASCII alphabetic characters
-    let pattern = format!(r"(?<![A-Za-z]){0}(?![A-Za-z])", fancy_regex::escape(target));
-    let Ok(re) = Regex::new(&pattern) else {
-        return None;
-    };
-
-    let Ok(Some(ma)) = re.find(input) else {
-        return None;
-    };
-
-    Some(ma.start())
-}
-
 pub async fn handle_create_sql_function(
     handler_args: HandlerArgs,
     or_replace: bool,