[VOL-5545] Exclude voltha-2.4 and voltha-2.5 from multiversion build

Both branches reference the kind-voltha repository in their Makefile
OTHER_REPO_DOCS which no longer exists, causing the sphinx-multiversion
build to fail when attempting to clone it. All other voltha-* branches
do not include kind-voltha and build successfully.

Change-Id: If78ddc7a0b0afe6701648442b3818ba3afd40ac8
Signed-off-by: Serkant Uluderya <serkant.uluderya@netsia.com>
1 file changed