Revert "Fix missed parameter file reading"

This reverts commit e1c08c25b5.

This fix was a mistake. No reading is needed, this is explorer
execution on the remote.

cdist/conf/type/__group/explorer/group

@@ -23,7 +23,7 @@
 #
 
 not_supported() {
-	echo "Your operating system ($(cat "$__explorer/os")) is currently not supported." >&2
+	echo "Your operating system ($("$__explorer/os")) is currently not supported." >&2
 	echo "Cannot extract group information." >&2
 	echo "Please contribute an implementation for it if you can." >&2
 	exit 1

cdist/conf/type/__group/explorer/gshadow

@@ -23,7 +23,7 @@
 #
 
 name=$__object_id
-os=$(cat "$__explorer/os")
+os=$("$__explorer/os")
 
 not_supported() {
 	echo "Your operating system ($os) is currently not supported." >&2