Fix code smells

Author: jerone

src/lib/types.ts

@@ -35,7 +35,7 @@ export type MessageIds =
  * Type for list of message identifiers.
  */
 export type MessageIdKeys = {
-  [_ in RuleOptionGroup]: { [_ in RuleOptionValue]: MessageIds };
+  [_ in RuleOptionGroup]: { [__ in RuleOptionValue]: MessageIds };
 };
 
 /**

src/lib/utils.ts

@@ -142,8 +142,7 @@ function getLocOffsetFix<T extends AST>(node: AstWithParent<T>): number {
   // Get all the whitespaces (including line-breaks) before the expression.
   const result = /^[\r\n\s\t]+/gm.exec(astWithSource.source);
   if (result !== null && result.length > 0) {
-    const offset = result[0].length;
-    return offset;
+    return result[0].length;
   }
 
   return 0;