remove failed test

tests/cases/fourslash/refactorAddOrRemoveBracesToArrowFunction21.ts

@@ -1,14 +0,0 @@
-/// <reference path='fourslash.ts' />
-
-//// const foo = /*a*/a/*b*/ => /* expression comment */ a + 1
-
-goTo.select("a", "b");
-edit.applyRefactor({
-    refactorName: "Add or remove braces in an arrow function",
-    actionName: "Add braces to arrow function",
-    actionDescription: "Add braces to arrow function",
-    newContent: `const foo = a => {
-    /* expression comment */
-    return a + 1;
-}`,
-});