The pythoncom thread model is set when pythoncom is imported
and cannot be changed afterwards.
The removed code was supposed to fix the Windows Nano server,
which is currently unsupported by cloudbase-init and thus,
no longer necessary.
Error log:
[WinError -2147417850] Cannot change thread mode after it is set
Closes-Bug: #1840659
Change-Id: If278b77a057553c61cada860861e349b2b1fac69