target: really remove the target/*/*.mk include

Commit 5faae4869027 claimed to do this, but it didn't - Causing
make to error out.

Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

target/Makefile.in

@@ -62,8 +62,6 @@ ifeq ($(BR2_TARGET_UBOOT),y)
 include target/u-boot/Makefile.in
 endif
 
-include target/*/*.mk
-
 # kernel rules
 # We already did add the kernel target to TARGETS and now just pull in the rules
 # to actually build this target.