[bugfix] Remove socket_timeout fix in config2.py

requests >= 2.20.1 is required and using requests < 2.4.0 is on
bot owner's own risk. The version is checked since March 2020
and it is no longer needed to fix socket_timeout value for
compatibility with this very outdated requests version published
before August 2014.

Removing this fix should solve T261748 probably.

Bug: T261748
Change-Id: I644efed987a1e102b9fb0fc62d7f510a49bc1232