eliminate nontrivial Reset(...) from TypedPythonObject
Summary:
This deletes Reset(...), except for the no-argument form Reset()
from TypedPythonObject, and therefore from PythonString, PythonList,
etc.
It updates the various callers to use assignment, As<>, Take<>,
and Retain<>, as appropriate.
followon to https://reviews.llvm.org/D69080
Reviewers: JDevlieghere, clayborg, labath, jingham
Reviewed By: labath
Subscribers: lldb-commits
Tags: #lldb
Differential Revision: https://reviews.llvm.org/D69133
llvm-svn: 375350