chore(sdk): remove orphaned, never-compiled files

[dsmfa10]

Problem

Two files are not declared by any mod, so they were never compiled:

1. src/tests/schema_hash_tests.rs

   • src/tests/mod.rs declares only mod v3_object_authoring_tests;; this file
     is never mounted.
   • It also mixes bare Hash32 (from an include!) with a generated::Hash32
     path, so it would not compile if wired in.

2. src/storage/dlv.rs

   • src/storage/mod.rs declares only bilateral, client_db, codecs, policy_fs, soft_vault — there is no mod dlv;. Its object_address helper is dead;
     the storage node has its own compute_object_address.

Fix

git rm both files. Nothing references them.

Verification

cargo check -p dsm_sdk unchanged.

CI gates & coverage

Full verification for this PR runs in CI — Rust (cargo fmt --check,
clippy -D warnings, workspace tests), Frontend, Android Unit Tests,
Coverage, SPDX headers, CodeQL (see the PR's Checks tab). The local
check noted above is a subset; the broader mandated gates (full workspace test
suite, codegen/scan, Android, Frontend) run in CI, not locally — none is
silently skipped.

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Codecov Report

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