removing print

Author: Alex Reedy

astroquery/mast/observations.py

@@ -1264,7 +1264,8 @@ def read_product(self, product_path, read_as="auto", ignore_unrecognized=False):
                 except Exception as e:
                     log.exception(f"Failed to open ASD File: {product_path} {e}")
         else:
-            print("Unsupported extension type")
+            log.error("Unsupported extension type")
+            return
 
 
 @async_to_sync