Parameters `release_name` and `name` are ignored by the Tiller handler's
`delete_resources` method because the deletions are handled using labels
rather than by name. Currently, values that do not represent the
parameters are being passed to the method, which sometimes leads to
cryptic logging messages. This change removes all references to the
aforementioned parameters and clarifies the corresponding docstring and
log message.
Change-Id: Ic43819a273bf9da5e8965f409a56307eb11b4922
5cafd027b5