[etherpad-web/oscp-backend] Drop ep_adminpads, not compatible with the current Etherpad release

[Andrea Veri <averi src gnome org>]

commit 98aee3c0abc6f1e5b03368106d76e82492b8d19f
Author: Andrea Veri <averi redhat com>
Date:   Mon Dec 13 17:48:29 2021 +0100

    Drop ep_adminpads, not compatible with the current Etherpad release

 Dockerfile | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
---
diff --git a/Dockerfile b/Dockerfile
index c145908..19d1599 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -24,8 +24,7 @@ ADD entrypoint.sh /entrypoint.sh
 USER etherpad
 WORKDIR /opt/etherpad
 RUN bin/installDeps.sh && rm settings.json && \
-    npm install ep_adminpads \
-      ep_align \
+    npm install ep_align \
       ep_spellcheck \
       ep_headings2 \
       ep_font_color \