fix: Remove hardcoded useIframe & captureConsole opts

These default options will override karma.conf.js even if they're explicitly set to false in there. This was kinda pointless anyway since Karma defaults these options to true anyway if they are not set.

Closes #165, #166

tasks/grunt-karma.js

@@ -49,9 +49,7 @@ module.exports = function (grunt) {
     if (options.client) {
       // Merge karma default options
       _.defaults(options.client, {
-        args: [],
-        useIframe: true,
-        captureConsole: true
+        args: []
       })
     }