Remove the superseded v5/v6/v7 search schema revisions

src/palace/manager/search/revision.py

@@ -21,7 +21,7 @@ def version(self) -> int:
 
     def name_for_index(self, base_name: str) -> str:
         """Produce the name of the index as it will appear in Opensearch,
-        such as 'circulation-works-v5'."""
+        such as 'circulation-works-v8'."""
         return f"{base_name}-v{self.version}"
 
     def script_name(self, script_name: str) -> str:

src/palace/manager/search/revision_directory.py

@@ -2,12 +2,9 @@
 
 from palace.manager.core.config import CannotLoadConfiguration
 from palace.manager.search.revision import SearchSchemaRevision
-from palace.manager.search.v5 import SearchV5
-from palace.manager.search.v6 import SearchV6
-from palace.manager.search.v7 import SearchV7
 from palace.manager.search.v8 import SearchV8
 
-REVISIONS = [SearchV5(), SearchV6(), SearchV7(), SearchV8()]
+REVISIONS = [SearchV8()]
 
 
 class SearchRevisionDirectory:

src/palace/manager/search/v8.py

@@ -20,15 +20,10 @@ class SearchV8(SearchSchemaRevision):
 
     This revision is intentionally **self-contained**: it does not inherit from
     any previous revision and defines its complete mapping (analyzers, filters,
-    and fields) directly. This is how new schema revisions are meant to be defined.
+    and fields) directly. This is how new schema revisions are to be defined.
 
-    We formed a bad habit for several old schema revisions where they just chained
-    off one another (``SearchV7`` -> ``SearchV6`` -> ``SearchV5``) which meant
-    no old revision could be removed without breaking the ones build on top of
-    it.
-
-    From now on every revision should stand alone so that, once nothing in
-    production is using an older version, that version's module can simply be deleted.
+    Every search revision should stand alone so that, once nothing in production
+    is using an older version, that version's module can simply be deleted.
 
     Changes in v8:
       - The shard and replica counts are set explicitly.