Gruntfile.js: Remove now unneeded validator relaxError option.
Gruntfile.js: Remove now unneeded validator relaxError option.

BS3 commits: 03e41b355c51474ebac21ba22f4626f05feba844

2947721120/todc-bootstrap,up2vs/todc-bootstrap,2947721120/googlebt4,todc/todc-bootstrap,todc/todc-bootstrap,aaroncnhk/todc-bootstrap,mozillo/todc-bootstrap,ztx1491/todc-bootstrap,todc/todc-bootstrap