update_engine: Remove unused symbols previously needed to link.

BUG=chromium:318536
BRANCH=ToT
TEST=manual

sudo rm /build/$BOARD/usr/lib64/libvboot_host.a
emerge-$BOARD vboot_reference update_engine

Change-Id: I9ce468c5dacd9a13755ba7958f666584824a680f
Signed-off-by: Bill Richardson <wfrichar@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/205783
Reviewed-by: Don Garrett <dgarrett@chromium.org>
Reviewed-by: Alex Deymo <deymo@chromium.org>
diff --git a/hardware.cc b/hardware.cc
index 77e00f1..0ffd58f 100644
--- a/hardware.cc
+++ b/hardware.cc
@@ -14,12 +14,6 @@
 #include "vboot/vboot_host.h"
 }
 
-// We don't use these variables, but libcgpt needs them defined to link.
-// TODO(dgarrett) chromium:318536
-const char* progname = "";
-const char* command = "";
-void (*uuid_generator)(uint8_t* buffer) = NULL;
-
 #include "update_engine/hwid_override.h"
 #include "update_engine/subprocess.h"
 #include "update_engine/utils.h"