Remove extraneous console output from TransactionStateManager tests (#7838)

test/unit/app/controllers/transactions/tx-state-manager-test.js

@@ -56,10 +56,7 @@ describe('TransactionStateManager', function () {
     it('should emit a rejected event to signal the exciton of callback', (done) => {
       const tx = { id: 1, status: 'unapproved', metamaskNetworkId: currentNetworkId, txParams: {} }
       txStateManager.addTx(tx)
-      const noop = function (err) {
-        if (err) {
-          console.log('Error: ', err)
-        }
+      const noop = () => {
         assert(true, 'event listener has been triggered and noop executed')
         done()
       }