Add new command reclass-remove-key

Example:
  reclass-remove-key -r parameters.linux.network.interface /srv/
diff --git a/setup.cfg b/setup.cfg
index 3da6344..3e4ece9 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -27,3 +27,4 @@
 [entry_points]
 console_scripts =
     reclass-dump-params = reclass_tools.cli:dump_params
+    reclass-remove-key = reclass_tools.cli:remove_key