remove kernel from common

altarch-common.cfg

 # kind: resf.peridot.v1.CatalogSync
 # raspberrypi2 kernel package:
-package {
-  name: "raspberrypi2"
-  type: PACKAGE_TYPE_NORMAL_SRC
-    
-    # This is the altarch-common empty repo that gets excluded at the top anyway
-    # It doesn't matter what gets included, because it gets excluded no matter what
-    repository {
-      name: "altarch-common"
-      include_filter: "raspberrypi2-kernel4.aarch64"
-    }
-}
-
 package {
   name: "uboot-tools"
   type: PACKAGE_TYPE_NORMAL_SRC