Build: Inline testswarm browserSet setting

Ref jquery/infrastructure#236

Author: jzaefferer

build/tasks/testswarm.js

@@ -63,7 +63,7 @@ function submit( commit, runs, configFile, extra, done ) {
 		name: "Commit <a href='" + commitUrl + "'>" + commit.substr( 0, 10 ) + "</a>" + extra,
 		runs: runs,
 		runMax: config.runMax,
-		browserSets: config.browserSets
+		browserSets: ["popular-no-ie6"]
 	}, function( error, passed ) {
 		if ( error ) {
 			grunt.log.error( error );