fix(ci): drop pysha3 (Python 3.12 has sha3 in hashlib), fix Rust unused import + clippy::io_other_error

Author: arhantbarmate

invariant/invariant-gates/src/registry.rs

@@ -93,8 +93,7 @@ impl Registry {
             agents: inner.meta.clone(),
             models: inner.models.iter().cloned().collect(),
         };
-        let json = serde_json::to_string_pretty(&file)
-            .map_err(|e| std::io::Error::new(std::io::ErrorKind::Other, e))?;
+        let json = serde_json::to_string_pretty(&file).map_err(std::io::Error::other)?;
         fs::write(path, json)
     }
 

invariant/invariant-gates/src/verifier.rs

@@ -190,7 +190,7 @@ impl Verifier {
 
 // ─── Receipt builder (miner side) ────────────────────────────────
 
-use crate::crypto::{compute_execution_hash, compute_receipt_digest as _crd};
+use crate::crypto::compute_execution_hash;
 
 /// Build a complete, correctly-signed receipt.
 /// Called by the miner after task execution.

requirements.txt

@@ -8,9 +8,9 @@ bittensor>=9.12.0
 numpy>=1.24.0
 
 # ── Keccak-256 for DePIN hardware identity ───────────────────────
-# Provides SHA3/Keccak.  Rust crate uses tiny-keccak natively —
-# this is only needed by the pure Python fallback path.
-pysha3>=1.0.2
+# Python 3.6+ includes sha3/keccak in the standard library hashlib.
+# pysha3 is NOT needed — hashlib.sha3_256() is available natively.
+# The Rust crate uses tiny-keccak directly (no Python dependency).
 
 # ── Phase 3 cross-subnet API ─────────────────────────────────────
 fastapi>=0.100.0