Cleanup: remove jshint remnants (#32885)

.gitignore

@@ -1,7 +1,6 @@
 .claude/
 .DS_Store
 .idea/
-.jshintrc
 .project
 .puppeteer_profile/
 .vs/

test/unit/utils/SmartComparer.js

@@ -30,7 +30,6 @@ function SmartComparer() {
 		if ( val1 === val2 ) return true;
 
 		// Null or undefined values.
-		/* jshint eqnull:true */
 		if ( val1 == null || val2 == null ) {
 
 			if ( val1 != val2 ) {