devtool: remove some unused return values

(From OE-Core rev: 30fd41bd06a61e9df47263d49119fb8e193cdf68)

Signed-off-by: Markus Lehtonen <markus.lehtonen@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/devtool

@@ -157,7 +157,7 @@ def _enable_workspace_layer(workspacedir, config, basepath):
     bblayers_conf = os.path.join(basepath, 'conf', 'bblayers.conf')
     if not os.path.exists(bblayers_conf):
         logger.error('Unable to find bblayers.conf')
-        return -1
+        return
     _, added = bb.utils.edit_bblayers_conf(bblayers_conf, workspacedir, config.workspace_path)
     if added:
         logger.info('Enabling workspace layer in bblayers.conf')

scripts/lib/devtool/standard.py

@@ -417,9 +417,6 @@ def _check_preserve(config, recipename):
                     tf.write(line)
     os.rename(newfile, origfile)
 
-    return False
-
-
 def modify(args, config, basepath, workspace):
     """Entry point for the devtool 'modify' subcommand"""
     import bb