Drop seccomp-s390-flock-ipc.patch for now

Drop "Allow flock and ipc syscall for s390 architecture" patch for now;
upstream has security concerns with it and it doesn't currently seem to
be needed.
1 job for master in 32 minutes and 53 seconds (queued for 1 second)
latest
Status Job ID Name Coverage
  Test
passed #376474
build

00:32:53