Auto merge of #85910 - cjgillot:no-meta-version, r=Aaron1011

Drop metadata_encoding_version.

Part of #85153

r? `@Aaron1011`

compiler/rustc_middle/src/ty/context.rs

@@ -1288,10 +1288,6 @@ impl<'tcx> TyCtxt<'tcx> {
         )
     }
 
-    pub fn metadata_encoding_version(self) -> Vec<u8> {
-        self.cstore.metadata_encoding_version().to_vec()
-    }
-
     pub fn encode_metadata(self) -> EncodedMetadata {
         let _prof_timer = self.prof.verbose_generic_activity("generate_crate_metadata");
         self.cstore.encode_metadata(self)