Revert "[python] set python API backwards comaptible version to minim…  …al Frodo version"

As per pull request here..
https://github.com/jmarshallnz/xbmc/commit/fd1b15e8bd28ea0967a06dad0417ef905304906c
"Add-on authors should use 2.1.0 as their API version, but there's no point breaking things that
are working just fine"