chore: cleanup session pool

Author: surbhigarg92

observability-test/database.ts

@@ -39,7 +39,6 @@ const {
   SEMATTRS_DB_NAME,
   SEMATTRS_DB_SQL_TABLE,
   SEMATTRS_DB_STATEMENT,
-  SEMATTRS_DB_SYSTEM,
   SEMATTRS_EXCEPTION_MESSAGE,
 } = require('@opentelemetry/semantic-conventions');
 

observability-test/observability.ts

@@ -226,6 +226,7 @@ describe('EndToEnd', async () => {
             'Begin Transaction',
             'Transaction Creation Done',
             ...cacheSessionEvents,
+            'Using Session',
             'Starting stream',
           ];
           await verifySpansAndEvents(

observability-test/session-pool.ts

@@ -547,9 +547,6 @@ describe('Transaction', () => {
     });
 
     it('no error with unset `id`', done => {
-      const expectedError = new Error(
-        'Transaction ID is unknown, nothing to rollback.',
-      );
       delete transaction.id;
 
       transaction.rollback(err => {