Remove a statement using a name that is never defined in scope.

The intention may have been to close the “current” database cursor; but
there is no reference to that at this point in the code.

auth-mastodon.py

@@ -61,7 +61,7 @@ try:
     )
     database.set_session(readonly=True, autocommit=True)
     logging.debug(database.get_dsn_parameters())
-except:
+except Exception:
     logging.error("Unable to initialize database, check settings!")
     time.sleep(10)
     sys.exit(1)
@@ -69,7 +69,6 @@ except:
 
 @atexit.register
 def close_db():
-    cursor.close()
     database.close()
 
 
@@ -94,7 +93,7 @@ def ejabberd_in():
 
     input_length = sys.stdin.buffer.read(2)
 
-    if len(input_length) is not 2:
+    if len(input_length) != 2:
         logging.debug("ejabberd sent us wrong things!")
         raise EjabberdInputError('Wrong input from ejabberd!')
 
@@ -138,16 +137,16 @@ def get_password(user, host):
     cursor.execute(db_query_getpass, {"user": user.lower(), "host": host})
     data = cursor.fetchone()
     cursor.close()
-    return data[0] if data != None else None
+    return data[0] if data is not None else None
 
 
 def isuser(user, host):
-    return get_password(user, host) != None
+    return get_password(user, host) is not None
 
 
 def auth(user, host, password):
     db_password = get_password(user, host)
-    if db_password == None:
+    if db_password is None:
         logging.debug("Wrong username: %s@%s" % (user, host))
         return False
     else:
@@ -172,7 +171,7 @@ while True:
         ejab_request = ejabberd_in().split(':', 3)
     except EOFError:
         break
-    except Exception as e:
+    except Exception:
         logging.exception("Exception occured while reading stdin")
         raise