Remove 'cleanUp =' from ueh

'cleanUp =' is an error in ueh

Author: keemor

snippets/snippets.json

@@ -11,7 +11,7 @@
 		"body": [
 			"useEffect(() => {",
 			"\t$1",
-			"\n\treturn cleanUp = () => {",
+			"\n\treturn () => {",
 			"\t\t$2",
 			"\t}",
 			"}, [${3}]);$0"
@@ -88,4 +88,4 @@
 			"const $1 = $2 => dispatch($3);"
 		]
 	}
-}
+}