Trim empty sections from changelog for release

CHANGES.rst

@@ -9,22 +9,13 @@ New Features
 - Centralize data label generation if user does not provide a label with data load. Also
   prevent duplicate data labels from being added to data collection. [#1672]
 
-Cubeviz
-^^^^^^^
-
 Imviz
 ^^^^^
 
 - Catalogs plugin now supports loading a JWST catalog from a local ECSV file. [#1707]
 
 - New "batch_load" context manager to optimize loading multiple images. [#1742]
 
-Mosviz
-^^^^^^
-
-Specviz
-^^^^^^^
-
 Specviz2d
 ^^^^^^^^^
 
@@ -37,24 +28,6 @@ Specviz2d
 - Spectral extraction plugin now supports visualizing and exporting the 1D spectrum associated
   with the background region. [#1682]
 
-API Changes
------------
-
-Cubeviz
-^^^^^^^
-
-Imviz
-^^^^^
-
-Mosviz
-^^^^^^
-
-Specviz
-^^^^^^^
-
-Specviz2d
-^^^^^^^^^
-
 Bug Fixes
 ---------
 
@@ -78,9 +51,6 @@ Mosviz
 
 - Fixed toolbar on 2d profile viewer. [#1778]
 
-Specviz
-^^^^^^^
-
 Specviz2d
 ^^^^^^^^^