[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/google_scholar.py

@@ -14,7 +14,6 @@ Definitions`_.
 from urllib.parse import urlencode
 from datetime import datetime
 from lxml import html
-from searx import logger
 
 from searx.utils import (
     eval_xpath,
@@ -53,8 +52,6 @@ use_locale_domain = True
 time_range_support = True
 safesearch = False
 
-logger = logger.getChild('google scholar')
-
 def time_range_url(params):
     """Returns a URL query component for a google-Scholar time range based on
     ``params['time_range']``.  Google-Scholar does only support ranges in years.