remove multi-argument form of PythonObject::Reset()

With this patch, only the no-argument form of `Reset()` remains in
PythonDataObjects.   It also deletes PythonExceptionState in favor of
PythonException, because the only call-site of PythonExceptionState was
also using Reset, so I cleaned up both while I was there.

Reviewers: JDevlieghere, clayborg, labath, jingham

Reviewed By: labath

Subscribers: mgorny, lldb-commits

Tags: #lldb

Differential Revision:

git-svn-id: 91177308-0d34-0410-b5e6-96231b3b80d8
15 files changed