Remove allocations from test

Author: aumetra

packages/vm/src/cache.rs

@@ -1438,15 +1438,15 @@ mod tests {
         cache.pin(&checksum).unwrap();
 
         let heavy_metrics = cache.heavy_metrics();
-        assert_eq!(heavy_metrics.hits_per_pinned_contract, vec![(checksum, 0)]);
+        assert_eq!(heavy_metrics.hits_per_pinned_contract, [(checksum, 0)]);
 
         let backend = mock_backend(&[]);
         let _ = cache
             .get_instance(&checksum, backend, TESTING_OPTIONS)
             .unwrap();
 
         let heavy_metrics = cache.heavy_metrics();
-        assert_eq!(heavy_metrics.hits_per_pinned_contract, vec![(checksum, 1)]);
+        assert_eq!(heavy_metrics.hits_per_pinned_contract, [(checksum, 1)]);
     }
 
     #[test]