For script tools and stand-alone scripts (scripts run outside of an ArcGIS application), you can enable or disable history logging using the SetLogHistory function.
The history log file is an Extensible Markup Language (XML) file that contains information about each geoprocessing operation. The information contained in the log file is essentially the same as that found in the Results window.
True, to enable geoprocessing logging history and False, to disable.
Turn off geoprocessing log history.
import arcpy arcpy.SetLogHistory(False)