Removed duplicated errors
Removed duplicated errors

Errors are already handled in form_widget (line 51). Errors are now shown twice.

In my previous commit, I seem to have confused client-side error handling (HTML5 required attribute) with server side error handling.
althaus/bootstrap-bundle,althaus/bootstrap-bundle,lashus/bootstrap-bundle,lashus/bootstrap-bundle,bigfoot90/bootstrap-bundle,braincrafted/bootstrap-bundle,braincrafted/bootstrap-bundle,webmozart/bootstrap-bundle,althaus/bootstrap-bundle,braincrafted/bootstrap-bundle,lashus/bootstrap-bundle,bigfoot90/bootstrap-bundle,webmozart/bootstrap-bundle,bigfoot90/bootstrap-bundle