cve-update-nvd2-native: Remove duplicated CVE_CHECK_DB_FILE definition

CVE_CHECK_DB_FILE is already defined in cve-check.bbclass which is
always inherited in cve-update-nvd2-native (There is a check line 40).

Remove it to avoid confusion. Otherwise, this should not change
anything.

(From OE-Core rev: 572ee5512a3d8941c6842af451ca6c9bb75773d3)

Signed-off-by: Yoann Congal <yoann.congal@smile.fr>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit e5f3f223885c17b7007c310273fc7c80b90a4105)
Signed-off-by: Steve Sakoman <steve@sakoman.com>

meta/recipes-core/meta/cve-update-nvd2-native.bb

@@ -37,8 +37,6 @@ CVE_DB_UPDATE_ATTEMPTS ?= "5"
 
 CVE_DB_TEMP_FILE ?= "${CVE_CHECK_DB_DIR}/temp_nvdcve_2.db"
 
-CVE_CHECK_DB_FILE ?= "${CVE_CHECK_DB_DIR}/nvdcve_2.db"
-
 python () {
     if not bb.data.inherits_class("cve-check", d):
         raise bb.parse.SkipRecipe("Skip recipe when cve-check class is not loaded.")