Stop overriding default umask for Fedora

Switch back to UPG (User Private Groups) on Fedora (keep umask 0002).
Signed-off-by: Cédric Marie <cedric@hjuvi.lautre.net>

bash/init

@@ -16,10 +16,6 @@
 
 PAINTED_SHELL_PATH=$(dirname $(dirname $BASH_SOURCE))
 
-# Override Fedora default umask (0002) to restrict the write permission to the
-# user (not the group)
-umask 0022
-
 # Enable extended color mode
 if [ "$TERM" = "xterm" ]; then
     export TERM=xterm-256color