refactor: self code review

Author: mdjastrzebski

Diff for: .gitignore

@@ -32,3 +32,4 @@ buck-out/
 lib/
 
 /.idea
+coverage/

Diff for: src/utils.ts

@@ -1,5 +1,3 @@
-import type { RegexElement } from './types';
-
 /**
  * Wraps regex string in a non-capturing group if it is more than one character long.
  *
@@ -10,18 +8,6 @@ export function wrapGroup(regex: string): string {
   return regex.length === 1 ? regex : `(?:${regex})`;
 }
 
-export function needsGrouping(element: RegexElement) {
-  if (typeof element === 'string') {
-    return element.length > 1;
-  }
-
-  if (element.type === 'characterClass') {
-    return false;
-  }
-
-  return true;
-}
-
 export function escapeText(text: string) {
   return text.replace(/[.*+?^${}()|[\]\\]/g, '\\$&'); // $& means the whole matched string
 }