Don't force iframe editor when gutenberg plugin and block theme are e…

…nabled (#65372)

Co-authored-by: t-hamano <wildworks@git.wordpress.org>
Co-authored-by: fabiankaegy <fabiankaegy@git.wordpress.org>
Co-authored-by: stokesman <presstoke@git.wordpress.org>

packages/edit-post/src/components/layout/use-should-iframe.js

@@ -6,33 +6,22 @@ import { useSelect } from '@wordpress/data';
 import { store as blocksStore } from '@wordpress/blocks';
 import { store as blockEditorStore } from '@wordpress/block-editor';
 
-const isGutenbergPlugin = globalThis.IS_GUTENBERG_PLUGIN ? true : false;
-
 export function useShouldIframe() {
-	const {
-		isBlockBasedTheme,
-		hasV3BlocksOnly,
-		isEditingTemplate,
-		isZoomOutMode,
-	} = useSelect( ( select ) => {
-		const { getEditorSettings, getCurrentPostType } = select( editorStore );
-		const { __unstableGetEditorMode } = select( blockEditorStore );
-		const { getBlockTypes } = select( blocksStore );
-		const editorSettings = getEditorSettings();
-		return {
-			isBlockBasedTheme: editorSettings.__unstableIsBlockBasedTheme,
-			hasV3BlocksOnly: getBlockTypes().every( ( type ) => {
-				return type.apiVersion >= 3;
-			} ),
-			isEditingTemplate: getCurrentPostType() === 'wp_template',
-			isZoomOutMode: __unstableGetEditorMode() === 'zoom-out',
-		};
-	}, [] );
-
-	return (
-		hasV3BlocksOnly ||
-		( isGutenbergPlugin && isBlockBasedTheme ) ||
-		isEditingTemplate ||
-		isZoomOutMode
+	const { hasV3BlocksOnly, isEditingTemplate, isZoomOutMode } = useSelect(
+		( select ) => {
+			const { getCurrentPostType } = select( editorStore );
+			const { __unstableGetEditorMode } = select( blockEditorStore );
+			const { getBlockTypes } = select( blocksStore );
+			return {
+				hasV3BlocksOnly: getBlockTypes().every( ( type ) => {
+					return type.apiVersion >= 3;
+				} ),
+				isEditingTemplate: getCurrentPostType() === 'wp_template',
+				isZoomOutMode: __unstableGetEditorMode() === 'zoom-out',
+			};
+		},
+		[]
 	);
+
+	return hasV3BlocksOnly || isEditingTemplate || isZoomOutMode;
 }