MdeModulePkg/RegularExpressionDxe: remove module-local ARRAY_SIZE macro

MdeModulePkg/RegularExpressionDxe: remove module-local ARRAY_SIZE macro

Rely on the central macro definition from "MdePkg/Include/Base.h" instead.

Cc: Cecil Sheng <cecil.sheng@hpe.com>
Cc: Feng Tian <feng.tian@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Feng Tian <feng.tian@Intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>