eal: remove compiler optimization workaround
eal: remove compiler optimization workaround

The compiler optimization was disabled a long time ago
without describing what was the exact issue.
Maybe it does not apply anymore.
As it looks unneeded, let's remove this strange pragma.

Signed-off-by: Thomas Monjalon <ee2fa8b2681c737f775687e475dcbf2028a412f1@6wind.com>

john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk,john-mcnamara-intel/dpdk