Bug 1074835 - Enable responsive design tests on Windows with e10s. r=me

devtools/client/responsivedesign/test/browser.ini

@@ -9,7 +9,6 @@ support-files =
 [browser_responsivecomputedview.js]
 [browser_responsiveruleview.js]
 [browser_responsiveui.js]
-skip-if = e10s && os == 'win'
 [browser_responsiveui_touch.js]
 [browser_responsiveuiaddcustompreset.js]
 [browser_responsive_devicewidth.js]