Remove obsolete BOARD_BVB_ENABLE reference

Test: None
Change-Id: Ic6af0ecb0bb6989501189344f9e57d21c4ced0bb
diff --git a/core/Makefile b/core/Makefile
index 6c7ac53..57f1d81 100644
--- a/core/Makefile
+++ b/core/Makefile
@@ -539,17 +539,10 @@
 endif
 endif
 
-ifeq ($(BOARD_BVB_ENABLE),true)
-BOARD_KERNEL_CMDLINE := $(strip $(BOARD_KERNEL_CMDLINE))
-ifdef BOARD_KERNEL_CMDLINE
-  INTERNAL_BVBTOOL_MAKE_BOOT_IMAGE_ARGS += --kernel_cmdline "$(BOARD_KERNEL_CMDLINE)"
-endif
-else
 BOARD_KERNEL_CMDLINE := $(strip $(BOARD_KERNEL_CMDLINE) buildvariant=$(TARGET_BUILD_VARIANT) $(VERITY_KEYID))
 ifdef BOARD_KERNEL_CMDLINE
 INTERNAL_BOOTIMAGE_ARGS += --cmdline "$(BOARD_KERNEL_CMDLINE)"
 endif
-endif
 
 INTERNAL_MKBOOTIMG_VERSION_ARGS := \
     --os_version $(PLATFORM_VERSION) \