Revert "Fix discoverd bug when dmidecode reports GB"

While the patch looks sane and the change worked locally,
it has broke the ironic-inspector gate. As we're close
to deprecating the DIB ramdisk in favor of IPA, I suggest
reverting it.

This reverts commit 802f14862c.

Change-Id: I0525e545cb2fe8ce184312a2f9bbe3763904f61a
Closes-Bug: #1534648

elements/ironic-discoverd-ramdisk/init.d/80-ironic-discoverd-ramdisk

@@ -44,7 +44,7 @@ CPU_ARCH=$(lscpu | grep Architecture | awk '{ print $2 }')
 update ".cpu_arch = \"$CPU_ARCH\""
 
 RAM=0
-for i in $(dmidecode --type memory | awk '($0~/Size/ && $2~/[0-9]/) {($3~/GB/) ? size=$2*1024 : size=$2; {print size;}}')
+for i in $(dmidecode --type memory | grep Size | awk '{ print $2; }' | grep -E '[0-9]+');
 do
     RAM=$(( RAM + $i ));
 done