Revert "util: update lp4x gen_part_id tool to include memory type"

This reverts commit eb7a1dd80e72ef435c71650284f355f7f57ebe72.

MEMORY_TYPE = lines in Makefiles are not longer needed. Drop it.

Change-Id: I96ac39a30555a870e7778a0e71d738407b6b89ef
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44895
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

util/spd_tools/lp4x/gen_part_id.go

@@ -174,7 +174,6 @@ func genMakefile(partIdList []partIds, makefileDirName string) error {
 	var s string
 
 	s += fmt.Sprintf("%s\n%s\n\n", generatedCodeLicense, autoGeneratedInfo)
-	s += fmt.Sprintf("MEMORY_TYPE = lp4x\n\n")
 	s += fmt.Sprintf("SPD_SOURCES =\n")
 
 	for i := 0; i < len(partIdList); i++ {