Remove @throws tags from I18n functions.
Remove @throws tags from I18n functions.

Closes #12346.

garethellis36/cakephp,ADmad/cakephp,CakeDC/cakephp,ndm2/cakephp,mvdriel/cakephp,cakephp/cakephp,davidyell/cakephp,garethellis36/cakephp,garethellis36/cakephp,davidyell/cakephp,dakota/cakephp,mvdriel/cakephp,ADmad/cakephp,CakeDC/cakephp,cakephp/cakephp,dakota/cakephp,davidyell/cakephp,CakeDC/cakephp,ndm2/cakephp,petteyg/cakephp,tenkoma/cakephp,ndm2/cakephp,mvdriel/cakephp,cakephp/cakephp,garethellis36/cakephp,CakeDC/cakephp,ndm2/cakephp,dakota/cakephp,tenkoma/cakephp,ADmad/cakephp,petteyg/cakephp,petteyg/cakephp,petteyg/cakephp,tenkoma/cakephp,cakephp/cakephp,tenkoma/cakephp,mvdriel/cakephp,ADmad/cakephp,dakota/cakephp