allscenarios-image-extra: Drop package-management image feature

Having a runtime package management tool on a read-only filesystsem
doesn't help much. We could support something in that regards for
development mode but at this point we don't have a defined story for it.
So let's drop it to not confuse users.

Fixes: https://git.ostc-eu.org/OSTC/OHOS/meta-ohos/-/issues/148


Signed-off-by: Andrei Gherzan <andrei.gherzan@huawei.com>

meta-ohos-core/recipes-core/images/allscenarios-image-extra.bb

@@ -7,3 +7,8 @@ require allscenarios-image-common.inc
 
 SUMMARY = "AllScenariOS Wayland image including the base OS \
 software stack"
+
+# The weston image pulls in package manager. We have a root filesystem that is
+# defaulted to read-only so a package manager would make little sense using
+# such a image feature.
+IMAGE_FEATURES_remove = "package-management"