diff --git a/plugins/catalog/src/alpha/createCatalogFilterExtension.tsx b/plugins/catalog/src/alpha/createCatalogFilterExtension.tsx
deleted file mode 100644
index 85d911ef3b..0000000000
--- a/plugins/catalog/src/alpha/createCatalogFilterExtension.tsx
+++ /dev/null
@@ -1,66 +0,0 @@
-/*
- * Copyright 2023 The Backstage Authors
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-import React, { lazy } from 'react';
-import {
-  AnyExtensionInputMap,
-  ExtensionBoundary,
-  PortableSchema,
-  coreExtensionData,
-  createExtension,
-} from '@backstage/frontend-plugin-api';
-
-/**
- * @alpha
- * @deprecated Use {@link CatalogFilterBlueprint} instead
- */
-export function createCatalogFilterExtension<
-  TInputs extends AnyExtensionInputMap,
-  TConfig,
->(options: {
-  namespace?: string;
-  name?: string;
-  inputs?: TInputs;
-  configSchema?: PortableSchema<TConfig>;
-  loader: (options: { config: TConfig }) => Promise<JSX.Element>;
-}) {
-  return createExtension({
-    kind: 'catalog-filter',
-    namespace: options.namespace,
-    name: options.name,
-    attachTo: { id: 'page:catalog', input: 'filters' },
-    inputs: options.inputs ?? {},
-    configSchema: options.configSchema,
-    output: {
-      element: coreExtensionData.reactElement,
-    },
-    factory({ config, node }) {
-      const ExtensionComponent = lazy(() =>
-        options
-          .loader({ config })
-          .then(element => ({ default: () => element })),
-      );
-
-      return {
-        element: (
-          <ExtensionBoundary node={node}>
-            <ExtensionComponent />
-          </ExtensionBoundary>
-        ),
-      };
-    },
-  });
-}
diff --git a/plugins/catalog/src/alpha/index.ts b/plugins/catalog/src/alpha/index.ts
index f004c4f19e..3357024fd9 100644
--- a/plugins/catalog/src/alpha/index.ts
+++ b/plugins/catalog/src/alpha/index.ts
@@ -15,7 +15,6 @@
  */
 
 export { default } from './plugin';
-export { createCatalogFilterExtension } from './createCatalogFilterExtension';
 
 export * from './blueprints';
 export * from './translation';