diff --git a/src/plugins/embeddable/public/lib/containers/container.ts b/src/plugins/embeddable/public/lib/containers/container.ts
index 8e7487323cf44..a160c469f05c3 100644
--- a/src/plugins/embeddable/public/lib/containers/container.ts
+++ b/src/plugins/embeddable/public/lib/containers/container.ts
@@ -44,7 +44,6 @@ import {
   IContainer,
   PanelState,
 } from './i_container';
-import { reactEmbeddableRegistryHasKey } from '../../react_embeddable_system';
 
 const getKeys = <T extends {}>(o: T): Array<keyof T> => Object.keys(o) as Array<keyof T>;
 
@@ -548,17 +547,6 @@ export abstract class Container<
   }
 
   private async onPanelAdded(panel: PanelState) {
-    // do nothing if this panel's type is in the new Embeddable registry.
-    if (reactEmbeddableRegistryHasKey(panel.type)) {
-      this.updateOutput({
-        embeddableLoaded: {
-          ...this.output.embeddableLoaded,
-          [panel.explicitInput.id]: true,
-        },
-      } as Partial<TContainerOutput>);
-      return;
-    }
-
     this.updateOutput({
       embeddableLoaded: {
         ...this.output.embeddableLoaded,
diff --git a/src/plugins/embeddable/public/mocks.tsx b/src/plugins/embeddable/public/mocks.tsx
index fcabaa7cdb6c7..cdfaa8e0ce01b 100644
--- a/src/plugins/embeddable/public/mocks.tsx
+++ b/src/plugins/embeddable/public/mocks.tsx
@@ -35,10 +35,7 @@ import {
 import { setKibanaServices } from './kibana_services';
 import { SelfStyledOptions } from './lib/self_styled_embeddable/types';
 import { EmbeddablePublicPlugin } from './plugin';
-import {
-  reactEmbeddableRegistryHasKey,
-  registerReactEmbeddableFactory,
-} from './react_embeddable_system';
+import { registerReactEmbeddableFactory } from './react_embeddable_system';
 import { registerAddFromLibraryType } from './add_from_library/registry';
 
 export { mockAttributeService } from './lib/attribute_service/attribute_service.mock';
@@ -110,7 +107,6 @@ const createSetupContract = (): Setup => {
 
 const createStartContract = (): Start => {
   const startContract: Start = {
-    reactEmbeddableRegistryHasKey: jest.fn().mockImplementation(reactEmbeddableRegistryHasKey),
     getEmbeddableFactories: jest.fn(),
     getEmbeddableFactory: jest.fn(),
     telemetry: jest.fn(),
diff --git a/src/plugins/embeddable/public/plugin.tsx b/src/plugins/embeddable/public/plugin.tsx
index 801b518a0bd01..18af7eda372ec 100644
--- a/src/plugins/embeddable/public/plugin.tsx
+++ b/src/plugins/embeddable/public/plugin.tsx
@@ -54,10 +54,7 @@ import {
 } from '../common/lib';
 import { getAllMigrations } from '../common/lib/get_all_migrations';
 import { setKibanaServices } from './kibana_services';
-import {
-  reactEmbeddableRegistryHasKey,
-  registerReactEmbeddableFactory,
-} from './react_embeddable_system';
+import { registerReactEmbeddableFactory } from './react_embeddable_system';
 import { registerAddFromLibraryType } from './add_from_library/registry';
 
 export interface EmbeddableSetupDependencies {
@@ -121,11 +118,6 @@ export interface EmbeddableSetup {
 }
 
 export interface EmbeddableStart extends PersistableStateService<EmbeddableStateWithType> {
-  /**
-   * Checks if a {@link ReactEmbeddableFactory} has been registered using {@link registerReactEmbeddableFactory}
-   */
-  reactEmbeddableRegistryHasKey: (type: string) => boolean;
-
   /**
    * @deprecated use {@link registerReactEmbeddableFactory} instead.
    */
@@ -224,8 +216,6 @@ export class EmbeddablePublicPlugin implements Plugin<EmbeddableSetup, Embeddabl
       );
 
     const embeddableStart: EmbeddableStart = {
-      reactEmbeddableRegistryHasKey,
-
       getEmbeddableFactory: this.getEmbeddableFactory,
       getEmbeddableFactories: this.getEmbeddableFactories,
       getAttributeService: (type: string, options) =>
diff --git a/src/plugins/embeddable/public/react_embeddable_system/index.ts b/src/plugins/embeddable/public/react_embeddable_system/index.ts
index d0bd95e32e10e..8b1b59da6767b 100644
--- a/src/plugins/embeddable/public/react_embeddable_system/index.ts
+++ b/src/plugins/embeddable/public/react_embeddable_system/index.ts
@@ -7,9 +7,6 @@
  * License v3.0 only", or the "Server Side Public License, v 1".
  */
 
-export {
-  reactEmbeddableRegistryHasKey,
-  registerReactEmbeddableFactory,
-} from './react_embeddable_registry';
+export { registerReactEmbeddableFactory } from './react_embeddable_registry';
 export { ReactEmbeddableRenderer } from './react_embeddable_renderer';
 export type { DefaultEmbeddableApi, ReactEmbeddableFactory } from './types';
diff --git a/src/plugins/embeddable/public/react_embeddable_system/react_embeddable_registry.test.tsx b/src/plugins/embeddable/public/react_embeddable_system/react_embeddable_registry.test.tsx
index aa3e9b0e99675..43f8541fbab7f 100644
--- a/src/plugins/embeddable/public/react_embeddable_system/react_embeddable_registry.test.tsx
+++ b/src/plugins/embeddable/public/react_embeddable_system/react_embeddable_registry.test.tsx
@@ -9,7 +9,6 @@
 
 import {
   registerReactEmbeddableFactory,
-  reactEmbeddableRegistryHasKey,
   getReactEmbeddableFactory,
 } from './react_embeddable_registry';
 import { ReactEmbeddableFactory } from './types';
@@ -33,9 +32,4 @@ describe('react embeddable registry', () => {
     registerReactEmbeddableFactory('test', getTestEmbeddableFactory);
     expect(getReactEmbeddableFactory('test')).toEqual(returnedFactory);
   });
-
-  it('can check if a factory is registered', () => {
-    expect(reactEmbeddableRegistryHasKey('test')).toBe(true);
-    expect(reactEmbeddableRegistryHasKey('notRegistered')).toBe(false);
-  });
 });
diff --git a/src/plugins/embeddable/public/react_embeddable_system/react_embeddable_registry.ts b/src/plugins/embeddable/public/react_embeddable_system/react_embeddable_registry.ts
index 0d007f85f7977..046b63d5531ab 100644
--- a/src/plugins/embeddable/public/react_embeddable_system/react_embeddable_registry.ts
+++ b/src/plugins/embeddable/public/react_embeddable_system/react_embeddable_registry.ts
@@ -40,8 +40,6 @@ export const registerReactEmbeddableFactory = <
   registry[type] = getFactory;
 };
 
-export const reactEmbeddableRegistryHasKey = (key: string) => registry[key] !== undefined;
-
 export const getReactEmbeddableFactory = async <
   SerializedState extends object = object,
   RuntimeState extends object = SerializedState,