INSTALL: Remove unclear note
INSTALL: Remove unclear note

This is either outdated or a mistake; one cannot "enable symlinks"
in the cabal config, and if `symlink-bindir` was meant, that will
barely help against dependency installation failures.

Signed-off-by: Niklas Hambuechen <98215d3a72cb13cc9c9956528e50119ca7d1fb8b@google.com>
Reviewed-by: Klaus Aehlig <4ce51de36d9068cd7db2eec1151e0f3f95419008@google.com>

onponomarev/ganeti,andir/ganeti,yiannist/ganeti,leshchevds/ganeti,dimara/ganeti,grnet/snf-ganeti,mbakke/ganeti,ganeti/ganeti,ganeti/ganeti,andir/ganeti,ganeti/ganeti,leshchevds/ganeti,andir/ganeti,yiannist/ganeti,bitemyapp/ganeti,bitemyapp/ganeti,grnet/snf-ganeti,dimara/ganeti,mbakke/ganeti,leshchevds/ganeti,onponomarev/ganeti,apyrgio/ganeti,mbakke/ganeti,apyrgio/ganeti,yiannist/ganeti