Remove python patching from voltha-docs build

There is no longer any need to patch Python functions in order to get
this to work. Python versions have been updated to current defaults,
and pinned to avoid future issues with changes.
RE: LF Jira IT-27751

Signed-off-by: Eric Ball <eball@linuxfoundation.org>
Change-Id: I925d48ecabf4d642500175d0ca3474cc333894c6
10 files changed