@0x/contracts-staking: Fix linter errors.

contracts/staking/test/params.ts

@@ -86,7 +86,6 @@ blockchainTests('Configurable Parameters', env => {
         describe('rewardDelegatedStakeWeight', () => {
             it('throws when > PPM_100_PERCENT', async () => {
                 const params = {
-                    // tslint:disable-next-line restrict-plus-operands
                     rewardDelegatedStakeWeight: constants.PPM_100_PERCENT + 1,
                 };
                 const tx = setParamsAndAssertAsync(params);

contracts/staking/test/pools_test.ts

@@ -323,7 +323,6 @@ blockchainTests('Staking Pool Management', env => {
 
             const makerAddresses = users.slice(
                 1,
-                // tslint:disable-next-line restrict-plus-operands
                 stakingConstants.DEFAULT_PARAMS.maximumMakersInPool.toNumber() + 2,
             );
             const makers = makerAddresses.map(makerAddress => new MakerActor(makerAddress, stakingApiWrapper));

contracts/staking/tslint.json

@@ -1,6 +1,7 @@
 {
     "extends": ["@0x/tslint-config"],
     "rules": {
-        "custom-no-magic-numbers": false
+        "custom-no-magic-numbers": false,
+        "restrict-plus-operands": false
     }
 }