remove stray error handling changes

Author: aditi-khare-mongoDB

src/mongo_logger.ts

@@ -509,7 +509,7 @@ function defaultLogTransform(
       return log;
     case SERVER_SELECTION_FAILED:
       log = attachServerSelectionFields(log, logObject, maxDocumentLength);
-      log.failure = logObject.failure?.message;
+      log.failure = logObject.failure.message;
       return log;
     case SERVER_SELECTION_SUCCEEDED:
       log = attachServerSelectionFields(log, logObject, maxDocumentLength);
@@ -536,7 +536,7 @@ function defaultLogTransform(
       log = attachCommandFields(log, logObject);
       log.message = 'Command failed';
       log.durationMS = logObject.duration;
-      log.failure = logObject.failure?.message ?? '(redacted)';
+      log.failure = logObject.failure.message ?? '(redacted)';
       return log;
     case CONNECTION_POOL_CREATED:
       log = attachConnectionFields(log, logObject);
@@ -666,7 +666,7 @@ function defaultLogTransform(
       log = attachServerHeartbeatFields(log, logObject);
       log.message = 'Server heartbeat failed';
       log.durationMS = logObject.duration;
-      log.failure = logObject.failure?.message;
+      log.failure = logObject.failure.message;
       return log;
     case TOPOLOGY_OPENING:
       log = attachSDAMFields(log, logObject);

test/unit/mongo_client.test.js

@@ -864,26 +864,6 @@ describe('MongoOptions', function () {
         });
       });
 
-      context('when option is not a valid MongoDBLogwritable stream', function () {
-        it('should default to stderr', function () {
-          const writable = {
-            buffer: [],
-            misNamedWrite(log) {
-              this.buffer.push(log);
-            }
-          };
-          const client = new MongoClient('mongodb://a/', {
-            [loggerFeatureFlag]: true,
-            mongodbLogPath: writable
-          });
-          const log = { t: new Date(), c: 'constructorInvalidOption', s: 'error' };
-          client.options.mongoLoggerOptions.logDestination.write(log);
-          expect(stderrStub.write).calledWith(
-            inspect(log, { breakLength: Infinity, compact: true })
-          );
-        });
-      });
-
       context('when option is `stdout`', function () {
         it('it is accessible through mongoLogger.logDestination', function () {
           const client = new MongoClient('mongodb://a/', {