MM-21882: Remove the license requirement to promote guests to regular users (#13790)

* MM-21882: Remove the license requirement to promote guests to regular users

* Removing unneded translation keys

Co-authored-by: mattermod <mattermod@users.noreply.github.com>

api4/user.go

@@ -1966,16 +1966,6 @@ func promoteGuestToUser(c *Context, w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	if c.App.License() == nil {
-		c.Err = model.NewAppError("Api4.promoteGuestToUser", "api.team.promote_guest_to_user.license.error", nil, "", http.StatusNotImplemented)
-		return
-	}
-
-	if !*c.App.Config().GuestAccountsSettings.Enable {
-		c.Err = model.NewAppError("Api4.promoteGuestToUser", "api.team.promote_guest_to_user.disabled.error", nil, "", http.StatusNotImplemented)
-		return
-	}
-
 	if !c.App.SessionHasPermissionTo(c.App.Session, model.PERMISSION_PROMOTE_GUEST) {
 		c.SetPermissionError(model.PERMISSION_PROMOTE_GUEST)
 		return