[auth][js] remove deprecated method fetchProvidersForEmail

src/modules/auth/index.js

@@ -502,18 +502,6 @@ export default class Auth extends ModuleBase {
     return getNativeModule(this).checkActionCode(code);
   }
 
-  /**
-   * Returns a list of authentication providers that can be used to sign in a given user (identified by its main email address).
-   * @return {Promise}
-   * @Deprecated
-   */
-  fetchProvidersForEmail(email: string): Promise<string[]> {
-    console.warn(
-      'Deprecated firebase.auth().fetchProvidersForEmail in favor of firebase.auth().fetchSignInMethodsForEmail()'
-    );
-    return getNativeModule(this).fetchSignInMethodsForEmail(email);
-  }
-
   /**
    * Returns a list of authentication methods that can be used to sign in a given user (identified by its main email address).
    * @return {Promise}