read ESO_TAP_URL from env var; otherwise use the config one

Author: juanmcloaiza

astroquery/eso/core.py

@@ -91,7 +91,6 @@ def __init__(self):
         self._collections: Optional[List[str]] = None
         self._auth_info: Optional[AuthInfo] = None
         self._hash = None
-        self.USE_DEV_TAP = True
 
     def tap_url(self) -> str:
         url = os.environ.get('ESO_TAP_URL', conf.tap_url)