remove unused variable from initialization

wile_coyote/tools/__init__.py

@@ -22,7 +22,6 @@ for loader, module_name, is_pkg in pkgutil.walk_packages(__path__):
     CONSUL_TOKEN = config.get("acme", "consul_token")
     WEB_BASE = config.get("acme", "web_base")
     ACME_PROVIDERS = config.get("acme", "acme_providers")
-    PROVIDERS_CA = l_eval(config.get("acme", "providers_ca"))
 
     # these parameters only work in test
     if "unit-test" in config.sections():