execute: do not check inherited fds again
execute: do not check inherited fds again

This is already done in do_lxcapi_start{l}() so a) no need to do it again here
and b) this would close the state socket pair sockets, corrup the fd, and lead
to EBADF.

Signed-off-by: Christian Brauner <48455ab3070520a2d174545c7239d6d0fabd9a83@ubuntu.com>

hallyn/lxc,ss1h2a3tw/lxc,hallyn/lxc,caglar10ur/lxc,caglar10ur/lxc,hallyn/lxc,caglar10ur/lxc,ss1h2a3tw/lxc,ss1h2a3tw/lxc