Remove duplicate JPG type (#25054)

app/javascript/types/image.d.ts

@@ -14,11 +14,6 @@ declare module '*.jpg' {
   export default path;
 }
 
-declare module '*.jpg' {
-  const path: string;
-  export default path;
-}
-
 declare module '*.png' {
   const path: string;
   export default path;