sys-process/lsof: remove USE=static

sys-process/lsof: remove USE=static

USE=static doesn't work with USE=rpc anymore since tirpc was moved to
net-libs/libtirpc:

- net-libs/libtirpc[static-libs] is broken: When net-libs/libtirpc was build
  with USE=kerberos it isn't guaranteed that virtual/krb5 provider was linked
  statically which is causing problems for lsof when trying to statically link
  against libtirpc.

- getrpcbynumber from print.c is now part of libc. However you cannot
  statically link against that libc component.

Closes: https://bugs.gentoo.org/667272
Package-Manager: Portage-2.3.51, Repoman-2.3.11
Signed-off-by: Thomas Deutschmann <whissi@gentoo.org>