remove outdated comment

parsing/src/suggestions.rs

@@ -29,8 +29,6 @@ pub fn split_function(input: &str) -> Vec<String> {
 }
 
 // __REVIEW__
-// __OPTIMIZE__
-// takes up to 33% of performance in calls like `buffer.iter().cloned().collect::<String>()` along with allocating `data` and `buffer` vectors
 pub fn split_function_chars(chars: &[char]) -> Vec<String> {
 	if chars.is_empty() {
 		return Vec::new();