Remove the hack, it won't work

sysadmin/letsencrypt_mail.py

@@ -32,11 +32,6 @@ def main():
     state = State.unknown
     text = list()
 
-    # https://stackoverflow.com/questions/33871836/find-out-if-there-is-input-from-a-pipe-or-not-in-python
-    if not select.select([sys.stdin], [], [], 0.0)[0]:
-        print("No input processed.")
-        sys.exit(1)
-
     for line in fileinput.input():
 
         line = line.strip()