docs: remove non-existent tools (#719)

Author: gagik

README.md

@@ -312,13 +312,10 @@ NOTE: atlas tools are only available when you set credentials on [configuration]
 - `find` - Run a find query against a MongoDB collection. The number of documents returned is limited by the `limit` parameter and the server's `maxDocumentsPerQuery` configuration, whichever is smaller. The total size of the returned documents is also limited by the `responseBytesLimit` parameter and the server's `maxBytesPerQuery` configuration, whichever is smaller.
 - `aggregate` - Run an aggregation against a MongoDB collection. The number of documents returned is limited by the server's `maxDocumentsPerQuery` configuration. The total size of the returned documents is also limited by the `responseBytesLimit` parameter and the server's `maxBytesPerQuery` configuration, whichever is smaller.
 - `count` - Get the number of documents in a MongoDB collection
-- `insert-one` - Insert a single document into a MongoDB collection
 - `insert-many` - Insert multiple documents into a MongoDB collection
 - `create-index` - Create an index for a MongoDB collection
-- `update-one` - Update a single document in a MongoDB collection
 - `update-many` - Update multiple documents in a MongoDB collection
 - `rename-collection` - Rename a MongoDB collection
-- `delete-one` - Delete a single document from a MongoDB collection
 - `delete-many` - Delete multiple documents from a MongoDB collection
 - `drop-collection` - Remove a collection from a MongoDB database
 - `drop-database` - Remove a MongoDB database