Remove useless arguments
Remove useless arguments

The `UserManager::deleteUser` does not take a second parameter and do the persist + flush right away so it would not make much sense to no do the flush with the update too.

teohhanhui/api-platform-core,api-platform/core,vincentchalamon/core,vincentchalamon/core,leesiongchan/DunglasApiBundle,vincentchalamon/core,meyerbaptiste/core,meyerbaptiste/core,soyuka/DunglasApiBundle,jdeniau/DunglasApiBundle,lucascherifi/DunglasApiBundle,meyerbaptiste/core,teohhanhui/api-platform-core,vincentchalamon/core,teohhanhui/api-platform-core,meyerbaptiste/core,jdeniau/DunglasApiBundle,ahlee2326/DunglasApiBundle,api-platform/core,api-platform/core,soyuka/core,soyuka/core,teohhanhui/api-platform-core,soyuka/core,jdeniau/DunglasApiBundle,teohhanhui/DunglasApiBundle,theofidry/DunglasApiBundle,soyuka/core,jdeniau/DunglasApiBundle,api-platform/core