Preset/stolperstein: Remove memorial:addr field

The `prerequisiteTag` did work nicely. However, the `"type": "address"` only allows to set `addr:*` keys, so we cannot re used it as is. Removing it for now…

Author: tordans

data/fields/memorial/addr_string.json data/fields/memorial/addr.jsondata/fields/memorial/addr_string.json renamed to data/fields/memorial/addr.json

@@ -6,8 +6,7 @@
         "wikidata"
     ],
     "moreFields": [
-        "memorial/addr_string",
-        "memorial/addr_addr",
+        "memorial/addr",
         "subject/wikidata",
         "image",
         "wikimedia_commons",