Removes the object with the given uid from the this.
Based on the offline_flag, it can remove also any information about locally made offline changes. Removing the object with
e_cache_is_offline will still remember it for later use with
get_offline_changes.
| this |
an Cache |
| uid |
a unique identifier of an object |
| offline_flag |
one of CacheOfflineFlag, whether removing the object in offline |
| cancellable |
optional Cancellable object, or null |
|
Whether succeeded. |