Remove aconfig storage files from next allolwlist

Bug: 369678122
Test: verified that these files do not appear in the `fileList` of
`generic_system_image` when building with TARGET_RELEASE=aosp_current
(more precisely, any release config which is not trunk_staging or
trunk)

Change-Id: Icf175df9846deb8b3e82b33469be890eb4b038f9
diff --git a/tools/filelistdiff/allowlist_next b/tools/filelistdiff/allowlist_next
index d7078f5..8f91c9f 100644
--- a/tools/filelistdiff/allowlist_next
+++ b/tools/filelistdiff/allowlist_next
@@ -7,9 +7,3 @@
 framework/oat/x86_64/apex@com.android.compos@javalib@service-compos.jar@classes.odex.fsv_meta
 framework/oat/x86_64/apex@com.android.compos@javalib@service-compos.jar@classes.vdex
 framework/oat/x86_64/apex@com.android.compos@javalib@service-compos.jar@classes.vdex.fsv_meta
-
-# Soong only installed files
-etc/aconfig/flag.info
-etc/aconfig/flag.map
-etc/aconfig/flag.val
-etc/aconfig/package.map