Remove documentation of removed option download.maxBundleSize

The code implementing this option was deleted in I9f7685164b (3.6.0).

Release-Notes: skip
Change-Id: I8656e9e379a2e99779dbf2b253f93e650784da61

Documentation/config-gerrit.txt

diff --git a/Documentation/config-gerrit.txt b/Documentation/config-gerrit.txt
index ced35e7..14059f5 100644
--- a/Documentation/config-gerrit.txt
+++ b/Documentation/config-gerrit.txt
@@ -2202,15 +2202,6 @@
 For this reason `zip` format is always excluded from formats offered
 through the `Download` drop down or accessible in the REST API.
 
-[[download.maxBundleSize]]download.maxBundleSize::
-+
-Specifies the maximum size of a bundle in bytes that can be downloaded.
-As bundles are kept in memory this setting is to protect the server
-from a single request consuming too much heap when generating
-a bundle and thereby impacting other users.
-+
-Defaults to 100MB.
-
 [[gc]]
 === Section gc