(PECL mongo >=1.0.8)
MongoGridFS::delete — Remove a file and its chunks from the database
MongoGridFS::delete() is a convenience method for calling MongoGridFS::remove() with specific
_id of the file to remove.
Returns an array containing the status of the removal (with respect to the
files collection) if a
write concern is applied.
Fields in the status array are described in the documentation for MongoCollection::insert().
Throws MongoCursorException if the "w" option is set and the write fails.
Throws MongoCursorTimeoutException if the "w" option is set to a value greater than one and the operation takes longer than MongoCursor::$timeout milliseconds to complete. This does not kill the operation on the server, it is a client-side timeout. The operation in MongoCollection::$wtimeout is milliseconds.