Revert "no need to warn about empty validator dir"

after discussion, we will provide an update with osc-source_validator instead

This reverts commit 828bb264ca.

osc/commandline.py

@@ -2830,6 +2830,7 @@ Please submit there instead, or use --nodevelproject to force direct submission.
         if opts.skip_validation:
             validators = None
         elif not os.path.exists(validators):
+            print "WARNING: validator directory", validators, "configured, but not existing (please install osc-source_validator). Skipping ..."
             validators = None
         if opts.verbose_validation:
             verbose_validation = 1

osc/conf.py

@@ -253,6 +253,9 @@ apiurl = %(apiurl)s
 #review requests interactively (default: off)
 #request_show_review = 1
 
+# Directory with executables to validate sources, esp before committing
+#source_validator_directory = /usr/lib/osc/source_validators
+
 [%(apiurl)s]
 user = %(user)s
 pass = %(pass)s