Remove unnecessary function call

index.js

@@ -18,12 +18,10 @@ module.exports = function simpleSinkStream(_options) {
		required,
		wrapValueAsOption("onResult"), {
			onResult: [ required, isFunction ],
			onAbort: [ isFunction ],
			onEnd: [ isFunction, defaultTo.literal(function defaultOnEnd() {
				// We return whatever value we got last from the specified onResult callback.
				return lastResult;
			})],
			onAbort: [ isFunction, defaultTo.literal(function defaultOnAbort() {
				// no-op
			})]
		}
	]);
@@ -88,7 +86,9 @@ module.exports = function simpleSinkStream(_options) {
					abortHandled = true;
					return Promise.try(() => {
						return onAbort();
						if (onAbort != null) {
							return onAbort();
						}
					}).then(() => {
						if (marker.reason instanceof Error) {
							// NOTE: This ensures that the original error causing the abort is thrown exactly once