lib/exchange-machine.js
function(reject) {
      let index = _.indexOf(this.deferred, reject);
      if (index >= 0) {
        this.deferred.splice(index, 1);
      }
    }
function(reject) {
      let index = _.indexOf(this.deferred, reject);
      if (index >= 0) {
        this.deferred.splice(index, 1);
      }
    }
function ( reject ) { let index = _ . indexOf ( this . deferred , reject ) ; if ( index >= 0 ) { this . deferred . splice ( index , 1 ) ; } }
Removes DeferredPromise from the tracked list

@private
@memberOf ExchangeMachine.prototype
Removes DeferredPromise from the tracked list