No need to build openseachest manually now

conf/build.manifest

@@ -268,7 +268,7 @@ additional-packages:
   install_recommends: true
 - name: openseachest
   comment: requested by performance team (NAS-106154)
-  install_recommends: true
+  install_recommends: false
 - name: python-is-python3
   comment: NAS-111358 (symlinks /usr/bin/python to python3)
   install_recommends: true
@@ -340,14 +340,6 @@ sources:
   predepscmd:
     - "apt install -y wget xz-utils"
     - "./pull.sh"
-- name: openseachest
-  branch: master
-  repo: https://github.com/truenas/openseachest
-  predepscmd:
-    - "apt install -y wget xz-utils"
-    - "./pull.sh"
-  deoptions: nocheck
-  generate_version: false
 - name: kernel
   repo: https://github.com/truenas/linux
   branch: truenas/linux-6.6