[IMPR] Do not create a folder for reading operation
[IMPR] Do not create a folder for reading operation

Assinging a file path to the filename creates the folder but this is
superfluous because reading from empty folder results in IOError which
also passes the constructor. The folder should be created by writing
the file only which is done in PrimaryIgnoreManager.ignore method.

Change-Id: Ibc46093fd060fd9dd2466df7d3394b5bc4df82f9

trishnaguha/pywikibot-core,darthbhyrava/pywikibot-local,happy5214/pywikibot-core,jayvdb/pywikibot-core,valhallasw/pywikibot-core,TridevGuha/pywikibot-core,hasteur/g13bot_tools_new,h4ck3rm1k3/pywikibot-core,icyflame/batman,happy5214/pywikibot-core,jayvdb/pywikibot-core,hasteur/g13bot_tools_new,Darkdadaah/pywikibot-core,Darkdadaah/pywikibot-core,magul/pywikibot-core,hasteur/g13bot_tools_new,h4ck3rm1k3/pywikibot-core,VcamX/pywikibot-core,magul/pywikibot-core,PersianWikipedia/pywikibot-core,npdoty/pywikibot,smalyshev/pywikibot-core,wikimedia/pywikibot-core,emijrp/pywikibot-core,wikimedia/pywikibot-core,npdoty/pywikibot