feat: Remove OIDC and SSO support

Existing SSO accounts have no local password, so the migration
deactivates them before dropping is_sso_user and the
identity_provider_user table.

client/src/components/users/EditUserEmailStep/EditUserEmailStep.jsx

@@ -47,12 +47,11 @@ const EditUserEmailStep = React.memo(({ id, onBack, onClose }) => {
 
   const {
     email,
-    isSsoUser,
     emailUpdateForm: { data: defaultData, isSubmitting, error },
   } = useSelector((state) => selectUserById(state, id));
 
   const withPasswordConfirmation = useSelector(
-    (state) => id === selectors.selectCurrentUserId(state) && !isSsoUser,
+    (state) => id === selectors.selectCurrentUserId(state),
   );
 
   const dispatch = useDispatch();

client/src/components/users/EditUserPasswordStep/EditUserPasswordStep.jsx

@@ -42,12 +42,11 @@ const EditUserPasswordStep = React.memo(({ id, onBack, onClose }) => {
   const selectUserById = useMemo(() => selectors.makeSelectUserById(), []);
 
   const {
-    isSsoUser,
     passwordUpdateForm: { data: defaultData, isSubmitting, error },
   } = useSelector((state) => selectUserById(state, id));
 
   const withPasswordConfirmation = useSelector(
-    (state) => id === selectors.selectCurrentUserId(state) && !isSsoUser,
+    (state) => id === selectors.selectCurrentUserId(state),
   );
 
   const dispatch = useDispatch();

client/src/components/users/EditUserUsernameStep/EditUserUsernameStep.jsx

@@ -47,12 +47,11 @@ const EditUserUsernameStep = React.memo(({ id, onBack, onClose }) => {
 
   const {
     username,
-    isSsoUser,
     usernameUpdateForm: { data: defaultData, isSubmitting, error },
   } = useSelector((state) => selectUserById(state, id));
 
   const withPasswordConfirmation = useSelector(
-    (state) => id === selectors.selectCurrentUserId(state) && !isSsoUser,
+    (state) => id === selectors.selectCurrentUserId(state),
   );
 
   const dispatch = useDispatch();