--- a/mercurial/revlog.py	Wed Feb 12 16:36:51 2025 +0100
+++ b/mercurial/revlog.py	Thu Feb 13 13:10:11 2025 +0100
@@ -237,11 +237,6 @@
     parse_index_v1_nodemap = None
 
 
-def parse_index_v1_rust(data, inline, default_header):
-    cache = (0, data) if inline else None
-    return rustrevlog.Index(data, default_header), cache
-
-
 # corresponds to uncompressed length of indexformatng (2 gigs, 4-byte
 # signed integer)
 _maxentrysize = 0x7FFFFFFF