Update call-stack-frame.tsx

Author: raunofreiberg

packages/next/src/client/components/react-dev-overlay/_experimental/internal/components/call-stack-frame/call-stack-frame.tsx

@@ -52,11 +52,6 @@ export const CallStackFrame: React.FC<{
       data-nextjs-call-stack-frame
       data-nextjs-call-stack-frame-ignored={!hasSource}
       {...props}
-      style={
-        {
-          '--index': index,
-        } as React.CSSProperties
-      }
     >
       <span
         data-nextjs-frame-expanded={!frame.ignored}