Drop elements with its namespace from conf

The translation related elements are now provided by separate files
fontconfig.its and fontconfig.loc. we don't need to have it in conf
anymore.

Fixes fontconfig/fontconfig#234
3 jobs for issue/234 in 4 minutes and 34 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #2807816
mingw-build

00:03:39

passed #2807814
shared-build

00:04:34

passed #2807815
static-build

00:03:20