Remove obsolete change of email on profile page (#13341)

* Remove obsolete change of email on profile page

The change email on the account profile page is out-of-date
and unnecessary.

Changing email should be done using the account page.

Fix #13336

Signed-off-by: Andrew Thornton <art27@cantab.net>

routers/user/setting/profile.go

@@ -91,7 +91,6 @@ func ProfilePost(ctx *context.Context, form auth.UpdateProfileForm) {
 	}
 
 	ctx.User.FullName = form.FullName
-	ctx.User.Email = form.Email
 	ctx.User.KeepEmailPrivate = form.KeepEmailPrivate
 	ctx.User.Website = form.Website
 	ctx.User.Location = form.Location