Revert "fix access request cache test race (#44653)" (#44787)

This reverts commit a422be4.

lib/services/access_request_cache.go

@@ -352,7 +352,6 @@ func (c *AccessRequestCache) getResourcesAndUpdateCurrent(ctx context.Context) e
 	c.rw.Lock()
 	defer c.rw.Unlock()
 	c.primaryCache = cache
-	close(c.initC)
 	return nil
 }
 
@@ -405,12 +404,6 @@ func (c *AccessRequestCache) initializationChan() <-chan struct{} {
 	return c.initC
 }
 
-// InitializationChan is part of the resourceCollector interface and gets the channel
-// used to signal that the accessRequestCache has been initialized.
-func (c *AccessRequestCache) InitializationChan() <-chan struct{} {
-	return c.initializationChan()
-}
-
 // Close terminates the background process that keeps the access request cache up to
 // date, and terminates any inflight load operations.
 func (c *AccessRequestCache) Close() error {

lib/services/access_request_cache_test.go

@@ -51,12 +51,6 @@ func newAccessRequestPack(t *testing.T) (accessRequestServices, *services.Access
 	})
 	require.NoError(t, err)
 
-	select {
-	case <-cache.InitializationChan():
-	case <-time.After(time.Second * 30):
-		require.FailNow(t, "timeout waiting for access request cache to initialize")
-	}
-
 	return svcs, cache
 }