Revert "Add back POST_update for API clients."

This reverts commit 605fa72772fa84b9245498f817cdc6d872ab3bdd.

This endpoint has had no significant traffic for months, and should be
safe to remove again at this point.

r2/r2/controllers/api.py

@@ -1217,80 +1217,6 @@ class ApiController(RedditController):
             # invalidated.  drop a new cookie.
             self.login(c.user)
 
-    @validatedForm(VUser('curpass', default = ''),
-                   VModhash(),
-                   email = ValidEmails("email", num = 1),
-                   password = VPasswordChange(['newpass', 'verpass']),
-                   verify = VBoolean("verify"),
-                   dest=VDestination())
-    @api_doc(api_section.account)
-    def POST_update(self, form, jquery, email, password, verify, dest):
-        """
-        Update account email address and password.
-
-        Called by /prefs/update on the site. For frontend form verification
-        purposes, `newpass` and `verpass` must be equal for a password change
-        to succeed.
-        """
-        # password is required to proceed
-        if form.has_errors("curpass", errors.WRONG_PASSWORD):
-            return
-        
-        # check if the email is valid.  If one is given and it is
-        # different from the current address (or there is not one
-        # currently) apply it
-        updated = False
-        if (not form.has_errors("email", errors.BAD_EMAILS) and
-            email):
-            if (not hasattr(c.user,'email') or c.user.email != email):
-                if c.user.email:
-                    emailer.email_change_email(c.user)
-                c.user.set_email(email)
-                # unverified email for now
-                c.user.email_verified = None
-                c.user._commit()
-                Award.take_away("verified_email", c.user)
-                updated = True
-            if verify:
-                # TODO: rate limit this?
-                if dest == '/':
-                    dest = None
-
-                emailer.verify_email(c.user, dest=dest)
-                form.set_text('.status',
-                     _("you should be getting a verification email shortly."))
-            else:
-                form.set_text('.status', _('your email has been updated'))
-
-        # user is removing their email
-        if (not email and c.user.email and 
-            (errors.NO_EMAILS, 'email') in c.errors):
-            c.errors.remove((errors.NO_EMAILS, 'email'))
-            c.user.set_email('')
-            c.user.email_verified = None
-            c.user._commit()
-            Award.take_away("verified_email", c.user)
-            updated = True
-            form.set_text('.status', _('your email has been updated'))
-
-        # change password
-        if (password and
-            not (form.has_errors("newpass", errors.BAD_PASSWORD) or
-                 form.has_errors("verpass", errors.BAD_PASSWORD_MATCH))):
-            change_password(c.user, password)
-            if c.user.email:
-                emailer.password_change_email(c.user)
-            if updated:
-                form.set_text(".status",
-                              _('your email and password have been updated'))
-            else:
-                form.set_text('.status',
-                              _('your password has been updated'))
-            form.set_inputs(curpass = "", newpass = "", verpass = "")
-            # the password has changed, so the user's cookie has been
-            # invalidated.  drop a new cookie.
-            self.login(c.user)
-
     @validatedForm(VUser(),
                    VModhash(),
                    delete_message = VLength("delete_message", max_length=500),