cpu: get rid of socket source code

None of the sockets has actual configuration options, so the source
for them is only cosmetical boilerplate. Hence, drop it. This reduces
the sockets to be selectors for certain CPU types, which will be dropped
in future commits, and mainboards will select their CPUs directly rather
than through an additional layer of indirection (sockets)

Change-Id: I0f52a65838875a73531ef8c92a171bb1a35be96e
Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-on: http://review.coreboot.org/9797
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <edward.ocallaghan@koparo.com>

src/cpu/intel/socket_LGA775/Makefile.inc

@@ -1,4 +1,3 @@
-ramstage-y += socket_LGA775.c
 subdirs-y += ../model_6ex
 subdirs-y += ../model_6fx
 subdirs-y += ../model_f3x

src/cpu/intel/socket_LGA775/socket_LGA775.c

@@ -1,5 +0,0 @@
-#include <device/device.h>
-
-struct chip_operations cpu_intel_socket_LGA775_ops = {
-	CHIP_NAME("Socket LGA775 CPU")
-};