Revert extra files

Author: hsubox76

common/api-review/analytics-exp.api.md

@@ -37,7 +37,7 @@ export type CustomEventName<T> = T extends EventNameString ? never : T;
 // @public
 export interface CustomParams {
     // (undocumented)
-    [key: string]: unknown;
+    [key: string]: any;
 }
 
 // @public

common/api-review/performance-exp.api.md

@@ -12,10 +12,7 @@ import { PerformanceTrace } from '@firebase/performance-types-exp';
 export { FirebasePerformance }
 
 // @public
-export function getPerformance(app: FirebaseApp): FirebasePerformance;
-
-// @public
-export function initializePerformance(app: FirebaseApp, settings?: PerformanceSettings): FirebasePerformance;
+export function getPerformance(app: FirebaseApp, settings?: PerformanceSettings): FirebasePerformance;
 
 export { PerformanceSettings }