Remove accidental changes

Author: Mohammad Hunan Chughtai

source/sdk/node/data-types/collections.txt

@@ -14,31 +14,3 @@ Collections - Node.js SDK
 
 Overview
 --------
-
-{+service-short+} has several types to represent groups of objects,
-which we call **collections**. A collection is an object that contains
-zero or more instances of one :ref:`{+service-short+} type
-<node-object-types>`. {+service-short+} collections are **homogenous**:
-all objects in a collection are of the same type.
-
-You can filter and sort any collection using {+client-database+}'s
-:ref:`query engine <node-client-query-engine>`. Collections are
-:ref:`live <node-live-object>`, so they always reflect the current state
-of the :term:`{+realm+} instance` on the current thread. You can also
-listen for changes in the collection by subscribing to :ref:`collection
-notifications <node-register-a-collection-change-listener>`.
-
-Lists
------
-
-
-Overview
-Lists & LinkingObjects
-Results Collection
-Results are Lazily Evaluated
-Collections are Live
-Working With Collections
-   Iteration
-   Limiting Query Results
-   Pagination
-Summary