Revert "feat(lib): implement executeOperationV2"

This reverts commit 67d4edf.

Author: kvwalker

lib/collection.js

@@ -46,6 +46,7 @@ const indexes = require('./operations/collection_ops').indexes;
 const indexExists = require('./operations/collection_ops').indexExists;
 const indexInformation = require('./operations/collection_ops').indexInformation;
 const insertMany = require('./operations/collection_ops').insertMany;
+const insertOne = require('./operations/collection_ops').insertOne;
 const isCapped = require('./operations/collection_ops').isCapped;
 const mapReduce = require('./operations/collection_ops').mapReduce;
 const optionsOp = require('./operations/collection_ops').optionsOp;
@@ -60,9 +61,6 @@ const updateDocuments = require('./operations/collection_ops').updateDocuments;
 const updateMany = require('./operations/collection_ops').updateMany;
 const updateOne = require('./operations/collection_ops').updateOne;
 
-const InsertOneOperation = require('./operations/insert_one');
-const executeOperationV2 = require('./operations/execute_operation_v2');
-
 /**
  * @fileOverview The **Collection** class is an internal class that embodies a MongoDB collection
  * allowing for insert/update/remove/find and other command operation on that MongoDB collection.
@@ -462,9 +460,7 @@ Collection.prototype.insertOne = function(doc, options, callback) {
  options.ignoreUndefined = this.s.options.ignoreUndefined;
  }
 
- const insertOneOperation = new InsertOneOperation(this, doc, options);
-
- return executeOperationV2(this.s.topology, insertOneOperation, callback);
+ return executeOperation(this.s.topology, insertOne, [this, doc, options, callback]);
 };
 
 /**