Revert "Add PATH option to config example"

This reverts commit 1984432.

Safer to not mention this as it makes it too easy to shoot yourself in the foot.

Author: lildude

backup.config-example

@@ -48,9 +48,3 @@ GHE_NUM_SNAPSHOTS=10
 #
 # WARNING: do not enable this, only useful for debugging/development
 #GHE_BACKUP_FSCK=no
-
-# The PATH for the backup utilities to use. The default PATH used is that of the
-# executing user which may not always be customizable or contain all the utilities
-# required by the backup utilities.
-#
-#PATH=""