Adjust fourslash test that fails under strictNullChecks.

Author: DanielRosenwasser

tests/cases/fourslash/renameDestructuringAssignmentNestedInFor.ts

@@ -7,7 +7,7 @@
 ////        secondary: string;
 ////    };
 ////}
-////let multiRobot: MultiRobot, [|[|{| "contextRangeIndex": 2 |}primary|]: string|], secondary: string, primaryA: string, secondaryA: string, i: number;
+////declare let multiRobot: MultiRobot, [|[|{| "contextRangeIndex": 2 |}primary|]: string|], secondary: string, primaryA: string, secondaryA: string, i: number;
 ////for ([|{ skills: { [|{| "contextRangeIndex": 4 |}primary|]: primaryA, secondary: secondaryA } } = multiRobot|], i = 0; i < 1; i++) {
 ////    primaryA;
 ////}