soc/intel/broadwell/pch/pch.c: Drop unused include

For some reason, this change makes ramstage slightly smaller.

Change-Id: I5564e06b797d787f0d1093bd9bd572d1ee7b2d54
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55583
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/intel/broadwell/pch/pch.c

@@ -7,7 +7,6 @@
 #include <device/pci_def.h>
 #include <soc/pch.h>
 #include <soc/pci_devs.h>
-#include <drivers/intel/gma/gma.h>	/* TODO: for reproducibility purposes only */
 #include <soc/rcba.h>
 #include <soc/serialio.h>
 #include <soc/spi.h>