Removed use-local option

It seems the "use-local" is the norm the the new conda-build.

This MR removes this option in our builds

For a green nightlies

bob/devtools/scripts/build.py

@@ -67,9 +67,6 @@ Examples:
 @click.option('-X', '--stable/--no-stable', default=False,
     help='Set this to **exclude** beta channels from your build - ' \
         'notice this option has no effect if you also pass --condarc')
-@click.option('-L', '--use-local/--no-use-local', default=False,
-    help='Set this to **include** the locally built packages on the search ' \
-        'list - notice this option has no effect if you also pass --condarc')
 @click.option('-d', '--dry-run/--no-dry-run', default=False,
     help='Only goes through the actions, but does not execute them ' \
         '(combine with the verbosity flags - e.g. ``-vvv``) to enable ' \
@@ -79,7 +76,7 @@ Examples:
 @verbosity_option()
 @bdt.raise_on_error
 def build(recipe_dir, python, condarc, config, no_test, append_file,
-    server, group, private, stable, use_local, dry_run, ci):
+    server, group, private, stable, dry_run, ci):
   """Builds package through conda-build with stock configuration
 
   This command wraps the execution of conda-build so that you use the same
@@ -107,7 +104,7 @@ def build(recipe_dir, python, condarc, config, no_test, append_file,
       condarc_options = yaml.load(f, Loader=yaml.FullLoader)
   else:
     # use default and add channels
-    all_channels = ['local'] if use_local else []
+    all_channels = []
     all_channels += channels + ['defaults']
     condarc_options = yaml.load(BASE_CONDARC, Loader=yaml.FullLoader)
     logger.info('Using the following channels during build:\n  - %s',