luci-base: remove default diag host from /etc/config/luci
luci-base: remove default diag host from /etc/config/luci

Now that luci-mod-admin-full figures out the proper diagnostics host
during postinstall we can remove the UCI section from the default
configuration file.

Signed-off-by: Jo-Philipp Wich <bd73d35759d75cc215150d1bbc94f1b1078bee01@mein.io>

daofeng2015/luci,981213/luci-1,artynet/luci,hnyman/luci,openwrt-es/openwrt-luci,chris5560/openwrt-luci,cshore-firmware/openwrt-luci,LuttyYang/luci,artynet/luci,remakeelectric/luci,teslamint/luci,wongsyrone/luci-1,remakeelectric/luci,teslamint/luci,openwrt/luci,tobiaswaldvogel/luci,LuttyYang/luci,shangjiyu/luci-with-extra,kuoruan/lede-luci,kuoruan/luci,daofeng2015/luci,nmav/luci,lbthomsen/openwrt-luci,openwrt-es/openwrt-luci,tobiaswaldvogel/luci,wongsyrone/luci-1,kuoruan/lede-luci,Noltari/luci,openwrt/luci,aa65535/luci,cshore/luci,cshore/luci,bittorf/luci,nmav/luci,Noltari/luci,lbthomsen/openwrt-luci,wongsyrone/luci-1,oneru/luci,oneru/luci,taiha/luci,nmav/luci,hnyman/luci,taiha/luci,oneru/luci,nmav/luci,artynet/luci,taiha/luci,cshore/luci,aa65535/luci,LuttyYang/luci,nmav/luci,kuoruan/luci,lbthomsen/openwrt-luci,chris5560/openwrt-luci,artynet/luci,kuoruan/lede-luci,mumuqz/luci,nmav/luci,artynet/luci,rogerpueyo/luci,chris5560/openwrt-luci,Noltari/luci,nmav/luci,hnyman/luci,rogerpueyo/luci,chris5560/openwrt-luci,kuoruan/luci,taiha/luci,teslamint/luci,shangjiyu/luci-with-extra,aa65535/luci,remakeelectric/luci,bittorf/luci,remakeelectric/luci,shangjiyu/luci-with-extra,981213/luci-1,lbthomsen/openwrt-luci,LuttyYang/luci,Noltari/luci,oneru/luci,Wedmer/luci,kuoruan/lede-luci,oneru/luci,bittorf/luci,kuoruan/luci,981213/luci-1,hnyman/luci,taiha/luci,aa65535/luci,teslamint/luci,bittorf/luci,Wedmer/luci,Wedmer/luci,hnyman/luci,daofeng2015/luci,Wedmer/luci,kuoruan/luci,hnyman/luci,Wedmer/luci,aa65535/luci,bittorf/luci,artynet/luci,artynet/luci,mumuqz/luci,rogerpueyo/luci,cshore/luci,wongsyrone/luci-1,Noltari/luci,teslamint/luci,tobiaswaldvogel/luci,mumuqz/luci,remakeelectric/luci,kuoruan/lede-luci,artynet/luci,cshore/luci,cshore-firmware/openwrt-luci,oneru/luci,openwrt-es/openwrt-luci,openwrt/luci,shangjiyu/luci-with-extra,Noltari/luci,openwrt/luci,981213/luci-1,mumuqz/luci,cshore-firmware/openwrt-luci,LuttyYang/luci,cshore-firmware/openwrt-luci,aa65535/luci,mumuqz/luci,remakeelectric/luci,kuoruan/luci,wongsyrone/luci-1,nmav/luci,rogerpueyo/luci,cshore/luci,mumuqz/luci,hnyman/luci,tobiaswaldvogel/luci,tobiaswaldvogel/luci,oneru/luci,kuoruan/luci,teslamint/luci,Wedmer/luci,rogerpueyo/luci,taiha/luci,bittorf/luci,openwrt-es/openwrt-luci,openwrt/luci,chris5560/openwrt-luci,rogerpueyo/luci,LuttyYang/luci,tobiaswaldvogel/luci,taiha/luci,teslamint/luci,cshore-firmware/openwrt-luci,taiha/luci,rogerpueyo/luci,LuttyYang/luci,oneru/luci,hnyman/luci,openwrt-es/openwrt-luci,rogerpueyo/luci,kuoruan/lede-luci,tobiaswaldvogel/luci,mumuqz/luci,openwrt/luci,Noltari/luci,Wedmer/luci,bittorf/luci,daofeng2015/luci,cshore-firmware/openwrt-luci,cshore/luci,daofeng2015/luci,981213/luci-1,cshore-firmware/openwrt-luci,lbthomsen/openwrt-luci,openwrt-es/openwrt-luci,mumuqz/luci,lbthomsen/openwrt-luci,wongsyrone/luci-1,Wedmer/luci,Noltari/luci,Noltari/luci,daofeng2015/luci,shangjiyu/luci-with-extra,chris5560/openwrt-luci,981213/luci-1,daofeng2015/luci,openwrt-es/openwrt-luci,daofeng2015/luci,981213/luci-1,wongsyrone/luci-1,chris5560/openwrt-luci,teslamint/luci,openwrt-es/openwrt-luci,kuoruan/lede-luci,bittorf/luci,kuoruan/luci,cshore/luci,cshore-firmware/openwrt-luci,remakeelectric/luci,nmav/luci,lbthomsen/openwrt-luci,openwrt/luci,wongsyrone/luci-1,LuttyYang/luci,shangjiyu/luci-with-extra,aa65535/luci,tobiaswaldvogel/luci,chris5560/openwrt-luci,remakeelectric/luci,shangjiyu/luci-with-extra,shangjiyu/luci-with-extra,artynet/luci,openwrt/luci,lbthomsen/openwrt-luci,kuoruan/lede-luci,aa65535/luci