.gitignore: Remove .cfg from the ignore list

The idea here is to not use sample files anymore, so
let's remove that restriction.
Signed-off-by: NLucas Meneghel Rodrigues <lmr@redhat.com>

.gitignore

@@ -11,7 +11,6 @@
 *.pyc
 *.orig
 *.bak
-*.cfg
 *.project
 *.pydevproject
 *.so