test(coverage): disabling cookbook coverage aggregation

Looks like gulp-istanbul-reporter uses an out-of-date version of the instanbul module, which expects

a report format incompatible with the newer version that comes with nyc. Disabling aggregation for

now until I remove the dependency on gulp-istanbul-reporter and let it rest in peace.

gulpfile.js

@@ -76,8 +76,7 @@ gulp.task('aggregate', () => {
     return merge([
         remapCoverageToTypescript(dirs.staging.reports.coverage.spec),
         remapCoverageToTypescript(dirs.staging.reports.coverage.behaviour.protractor),
-        remapCoverageToTypescript(dirs.staging.reports.coverage.behaviour.cucumber),
-        gulp.src(dirs.staging.reports.coverage.cookbook)
+        remapCoverageToTypescript(dirs.staging.reports.coverage.behaviour.cucumber)
     ])
         // .pipe(gulp.dest(dirs.staging.reports.coverage.all));