Correctly report spec and suite duration

Previously, suite duration was always reported as 0 and spec duration
was always reported as null. Suites always used a no-op timer, and
specs set their result.duration after the result had already been sent
to reporters.

Fixes #1676.

src/core/requireCore.js

@@ -49,7 +49,6 @@ var getJasmineRequireObj = (function(jasmineGlobal) {
     j$.Expector = jRequire.Expector(j$);
     j$.Expectation = jRequire.Expectation(j$);
     j$.buildExpectationResult = jRequire.buildExpectationResult(j$);
-    j$.noopTimer = jRequire.noopTimer();
     j$.JsApiReporter = jRequire.JsApiReporter(j$);
     j$.asymmetricEqualityTesterArgCompatShim = jRequire.asymmetricEqualityTesterArgCompatShim(
       j$