diff --git a/developer_manual/app/css.rst b/developer_manual/app/css.rst
index 570318370..c132b514b 100644
--- a/developer_manual/app/css.rst
+++ b/developer_manual/app/css.rst
@@ -83,9 +83,6 @@ To use icons which are shipped in core, special class to apply the background im
 * **icon-loading-small**:
     .. image:: ../img/7/loading-small.png
 
-* **icon-noise**:
-    .. image:: ../img/7/noise.png
-
 * **icon-add**:
     .. image:: ../img/7/actions/add.png
 
diff --git a/developer_manual/img/7/noise.png b/developer_manual/img/7/noise.png
deleted file mode 100644
index 6c06c8a4d..000000000
Binary files a/developer_manual/img/7/noise.png and /dev/null differ