[VOL-4371] Voltha protos cleanup

Change-Id: If17761734c21223a9340fea10ca46a10b22a5d00
diff --git a/.golangci.yml b/.golangci.yml
index a2cab26..e980426 100644
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -53,3 +53,6 @@
       linters:
         - gosec
   exclude-use-default: false
+  exclude:
+    - "SA1019: voltha.ImageDownloads is deprecated"
+    - "SA1019: voltha.ImageDownload is deprecated"