diff --git a/packages/blocks/src/api/registration.js b/packages/blocks/src/api/registration.js
index b4b0618ac67f18..af0dd733cf7410 100644
--- a/packages/blocks/src/api/registration.js
+++ b/packages/blocks/src/api/registration.js
@@ -160,11 +160,6 @@ export const serverSideBlockDefinitions = {};
 // eslint-disable-next-line camelcase
 export function unstable__bootstrapServerSideBlockDefinitions( definitions ) {
 	for ( const blockName of Object.keys( definitions ) ) {
-		// Don't overwrite if already set. It covers the case when metadata
-		// was initialized from the server.
-		if ( serverSideBlockDefinitions[ blockName ] ) {
-			continue;
-		}
 		serverSideBlockDefinitions[ blockName ] = mapKeys(
 			pickBy( definitions[ blockName ], ( value ) => ! isNil( value ) ),
 			( value, key ) => camelCase( key )
diff --git a/packages/e2e-tests/plugins/register-block-type-hooks.php b/packages/e2e-tests/plugins/register-block-type-hooks.php
deleted file mode 100644
index 39709110c6270e..00000000000000
--- a/packages/e2e-tests/plugins/register-block-type-hooks.php
+++ /dev/null
@@ -1,28 +0,0 @@
-<?php
-/**
- * Plugin Name: Gutenberg Test Register Block Type Hooks
- * Plugin URI: https://github.com/WordPress/gutenberg
- * Author: Gutenberg Team
- *
- * @package gutenberg-test-register-block-type-hooks
- */
-
-/**
- * Changes the category for the paragraph block.
- *
- * @param array $metadata Array of metadata for registering a block type.
- *
- * @return array Filtered metadata for registering a block type.
- */
-function gutenberg_test_block_type_metadata( $metadata ) {
-	if ( 'core/paragraph' !== $metadata['name'] ) {
-		return $metadata;
-	}
-
-	return array_merge(
-		$metadata,
-		array( 'category' => 'widgets' )
-	);
-}
-
-add_filter( 'block_type_metadata', 'gutenberg_test_block_type_metadata' );
diff --git a/packages/e2e-tests/specs/editor/plugins/register-block-type-hooks.test.js b/packages/e2e-tests/specs/editor/plugins/register-block-type-hooks.test.js
deleted file mode 100644
index d623dac3833f8f..00000000000000
--- a/packages/e2e-tests/specs/editor/plugins/register-block-type-hooks.test.js
+++ /dev/null
@@ -1,32 +0,0 @@
-/**
- * WordPress dependencies
- */
-import {
-	activatePlugin,
-	createNewPost,
-	deactivatePlugin,
-	openGlobalBlockInserter,
-} from '@wordpress/e2e-test-utils';
-
-describe( 'Register block type hooks', () => {
-	beforeEach( async () => {
-		await activatePlugin( 'gutenberg-test-register-block-type-hooks' );
-		await createNewPost();
-	} );
-
-	afterEach( async () => {
-		await deactivatePlugin( 'gutenberg-test-register-block-type-hooks' );
-	} );
-
-	it( 'has a custom category for Paragraph block', async () => {
-		await openGlobalBlockInserter();
-
-		const widgetsCategory = await page.$(
-			'.block-editor-block-types-list[aria-label="Widgets"]'
-		);
-
-		expect(
-			await widgetsCategory.$( '.editor-block-list-item-paragraph' )
-		).toBeDefined();
-	} );
-} );