Remove pages object
Remove pages object

The HAR Spec says that the field can be left out by applications that don't
group by pages.

http://www.softwareishard.com/blog/har-12-spec/#log

dwfreed/mitmproxy,dwfreed/mitmproxy,Kriechi/mitmproxy,mitmproxy/mitmproxy,MatthewShao/mitmproxy,mhils/mitmproxy,StevenVanAcker/mitmproxy,mosajjal/mitmproxy,StevenVanAcker/mitmproxy,vhaupert/mitmproxy,vhaupert/mitmproxy,ujjwal96/mitmproxy,cortesi/mitmproxy,vhaupert/mitmproxy,xaxa89/mitmproxy,MatthewShao/mitmproxy,Kriechi/mitmproxy,mhils/mitmproxy,zlorb/mitmproxy,laurmurclar/mitmproxy,ddworken/mitmproxy,cortesi/mitmproxy,mitmproxy/mitmproxy,xaxa89/mitmproxy,xaxa89/mitmproxy,ddworken/mitmproxy,ujjwal96/mitmproxy,ddworken/mitmproxy,MatthewShao/mitmproxy,ddworken/mitmproxy,MatthewShao/mitmproxy,laurmurclar/mitmproxy,mitmproxy/mitmproxy,mosajjal/mitmproxy,Kriechi/mitmproxy,StevenVanAcker/mitmproxy,cortesi/mitmproxy,mosajjal/mitmproxy,cortesi/mitmproxy,StevenVanAcker/mitmproxy,laurmurclar/mitmproxy,dwfreed/mitmproxy,mhils/mitmproxy,zlorb/mitmproxy,mitmproxy/mitmproxy,dwfreed/mitmproxy,mosajjal/mitmproxy,mitmproxy/mitmproxy,laurmurclar/mitmproxy,zlorb/mitmproxy,mhils/mitmproxy,zlorb/mitmproxy,ujjwal96/mitmproxy,xaxa89/mitmproxy,ujjwal96/mitmproxy,vhaupert/mitmproxy,Kriechi/mitmproxy,mhils/mitmproxy