Removed redundant Expo configuration changes from ubuntu-config.patch:
The reflection scale change, because reflection is disabled by default anyway.
The inactive viewport saturation change from 100.0% to 40.0%, because this
option does not work (and never did AFAICR), but if it finally gets fixed
Expo's look would dramatically change.
(LP: #1178965). Fixes: https://bugs.launchpad.net/bugs/1178965.
Approved by PS Jenkins bot, Sam Spilsbury.