address comments

contracts/integrations/test/framework/assertions/moveStake.ts

@@ -9,7 +9,6 @@ import {
     StoredBalance,
 } from '@0x/contracts-staking';
 import { expect } from '@0x/contracts-test-utils';
-import { SafeMathRevertErrors } from '@0x/contracts-utils';
 import { BigNumber } from '@0x/utils';
 import { TxData } from 'ethereum-types';
 import * as _ from 'lodash';
@@ -221,31 +220,4 @@ export function moveStakeNonexistentPoolAssertion(
         },
     );
 }
-
-/**
- * Returns a FunctionAssertion for `moveStake` which assumes the input amount exceeds the moveable
- * amount of stake. Checks that the transaction reverts.
- */
-export function moveStakeInvalidAmountAssertion(
-    deployment: DeploymentManager,
-): FunctionAssertion<[StakeInfo, StakeInfo, BigNumber], void, void> {
-    return new FunctionAssertion<[StakeInfo, StakeInfo, BigNumber], void, void>(
-        deployment.staking.stakingWrapper,
-        'moveStake',
-        {
-            after: async (_beforeInfo: void, result: FunctionResult) => {
-                // Ensure that the tx reverted.
-                expect(result.success).to.be.false();
-
-                // This isn't ideal but unfortunately there are several different revert errors that
-                // can be triggered by trying to move more stake than possible.
-                expect(
-                    result.data instanceof SafeMathRevertErrors.Uint256BinOpError ||
-                        result.data instanceof SafeMathRevertErrors.Uint256DowncastError ||
-                        result.data instanceof StakingRevertErrors.InsufficientBalanceError,
-                ).to.be.true();
-            },
-        },
-    );
-}
 /* tslint:enable:no-unnecessary-type-assertion */