Drop warning about files without scenarios

It's a silly warning.

1 files changed, 0 insertions, 2 deletions

diff --git a/yarn b/yarn
index fdfc695..f29c72d 100755
--- a/yarn
+++ b/yarn
@@ -187,8 +187,6 @@ class YarnRunner(cliapp.Application):
         for filename in filenames:
             self.info(0, 'Parsing scenario file %s' % filename)
             blocks = mdparser.parse_file(filename)
-            if not blocks:
-                self.warning('No scenario code blocks in %s' % filename)
 
         block_parser = yarnlib.BlockParser()
         block_parser.parse_blocks(mdparser.blocks)