Remove some packages from nolto.conf

[Connor-GH]

Nowadays, the following packages are filtered with filter-lto:

net-libs/webkit-gtk:3
net-libs/webkit-gtk:4
media-video/ffmpeg
dev-libs/libaio
media-sound/jack2
net-misc/networkmanager
sys-apps/sandbox
app-emulation/virtualbox
app-emulation/wine*
app-office/libreoffice
dev-lang/mono
>=dev-lang/php-7.2.0
dev-lang/rust
dev-lang/spidermonkey
dev-util/github-cli
dev-util/perf
dev-util/valgrind
net-libs/nodejs
sys-devel/clang
sys-devel/gdb
sys-devel/llvm
sys-boot/syslinux

They do not need to be in the nolto env file now. This comes with the added bonus that in the future, if LTO does work, then the user will receive the benefit.