fix from rebase

Author: rickhanlonii

packages/react-is/src/ReactIs.js

@@ -26,7 +26,6 @@ import {
   REACT_VIEW_TRANSITION_TYPE,
   REACT_SCOPE_TYPE,
   REACT_LEGACY_HIDDEN_TYPE,
-  REACT_OFFSCREEN_TYPE,
   REACT_TRACING_MARKER_TYPE,
 } from 'shared/ReactSymbols';
 
@@ -116,7 +115,6 @@ export function isValidElementType(type: mixed): boolean {
     type === REACT_SUSPENSE_TYPE ||
     type === REACT_SUSPENSE_LIST_TYPE ||
     (enableLegacyHidden && type === REACT_LEGACY_HIDDEN_TYPE) ||
-    type === REACT_OFFSCREEN_TYPE ||
     (enableScopeAPI && type === REACT_SCOPE_TYPE) ||
     (enableTransitionTracing && type === REACT_TRACING_MARKER_TYPE) ||
     (enableViewTransition && type === REACT_VIEW_TRANSITION_TYPE)