device: Drop unused uma_memory_{base,size} globals

These global variables are not used anywhere. Drop them.

Change-Id: I3fe60b970153d913ae7b005257e2b53647d6f343
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/53977
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/device/device.c

@@ -66,12 +66,6 @@ void dev_finalize_chips(void)
 
 DECLARE_SPIN_LOCK(dev_lock)
 
-#if CONFIG(GFXUMA)
-/* IGD UMA memory */
-uint64_t uma_memory_base = 0;
-uint64_t uma_memory_size = 0;
-#endif
-
 /**
  * Allocate a new device structure.
  *