Removed checks for PhantomJS 1

v2 has been out for a long time, and v1 can no longer be easily installed.

spec/helpers/BrowserFlags.js

@@ -12,8 +12,4 @@
     return /Firefox\/([0-9]{0,})/.exec(userAgent);
   });
 
-  env.phantomVersion = browserVersion(function(userAgent) {
-    return /PhantomJS\/([0-9]{0,})/.exec(userAgent);
-  });
-
 })(jasmine.getEnv());