refactor: test

Author: alkatrivedi

observability-test/database.ts

@@ -503,7 +503,6 @@ describe('Database', () => {
   });
 
   describe('getSnapshot', () => {
-    let fakePool: FakeSessionPool;
     let fakeSessionFactory: FakeSessionFactory;
     let fakeSession: FakeSession;
     let fakeMultiplexedSession: FakeMultiplexedSession;
@@ -564,15 +563,15 @@ describe('Database', () => {
           );
 
           // Ensure that the span actually produced an error that was recorded.
-          const firstSpan = spans[0];
+          const span = spans[0];
           assert.strictEqual(
             SpanStatusCode.ERROR,
-            firstSpan.status.code,
+            span.status.code,
             'Expected an ERROR span status'
           );
           assert.strictEqual(
             'our snapshot error',
-            firstSpan.status.message,
+            span.status.message,
             'Mismatched span status message'
           );