No longer duplicate constraints for tab view on laying out subviews.
No longer duplicate constraints for tab view on laying out subviews.

brave/browser-ios,brave/browser-ios,Allow2CEO/browser-ios,brave/browser-ios,brave/browser-ios,Allow2CEO/browser-ios,brave/browser-ios,Allow2CEO/browser-ios,Allow2CEO/browser-ios,brave/browser-ios,Allow2CEO/browser-ios,Allow2CEO/browser-ios,brave/browser-ios,Allow2CEO/browser-ios,brave/browser-ios,brave/browser-ios,Allow2CEO/browser-ios