Drop workaround for qemu-user-static hang after r517350

GSlice as used by qemu-user still aborts due to low RLIMIT_VMEM in an
emulated application but no longer hangs. While the behavior differs
from real hardware it matches the one from before r456518 that was
hardcoded as gl_cv_func_printf_enomem=no workaround.

PR: 224740