Move spec execution from Spec to TreeRunner

src/core/SuiteBuilder.js

@@ -237,7 +237,6 @@ getJasmineRequireObj().SuiteBuilder = function(j$) {
       const config = this.env_.configuration();
       const suite = this.currentDeclarationSuite_;
       const parentSuiteId = suite === this.topSuite ? null : suite.id;
-      const global = j$.getGlobal();
       const spec = new j$.Spec({
         id: 'spec' + this.nextSpecId_++,
         filename,
@@ -245,7 +244,6 @@ getJasmineRequireObj().SuiteBuilder = function(j$) {
         beforeAndAfterFns: beforeAndAfterFns(suite),
         expectationFactory: this.expectationFactory_,
         asyncExpectationFactory: this.specAsyncExpectationFactory_,
-        setTimeout: global.setTimeout.bind(global),
         onLateError: this.onLateError_,
         getPath: spec => this.getSpecPath_(spec, suite),
         description: description,