[mod] one logger per engine - drop obsolete logger.getChild

Remove the no longer needed `logger = logger.getChild(...)` from engines.

Signed-off-by: Markus Heiser <markus.heiser@darmarit.de>

searx/engines/gigablast.py

@@ -8,7 +8,6 @@
 import re
 from json import loads
 from urllib.parse import urlencode
-# from searx import logger
 from searx.network import get
 
 # about