[indico-web] Revert "static: Create empty custom directory"

[Bartłomiej Piotrowski <bpiotrowski src gnome org>]

commit 12b51aa2e0d46492f0a6830ea7221be786ab9bef
Author: Bartłomiej Piotrowski <bpiotrowski gnome org>
Date:   Fri Dec 20 21:03:42 2019 +0100

    Revert "static: Create empty custom directory"
    
    This reverts commit 17869f79fa5156bdf587b33866351032770172b3.

 static/Dockerfile | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
---
diff --git a/static/Dockerfile b/static/Dockerfile
index c4f5d51..1b02257 100644
--- a/static/Dockerfile
+++ b/static/Dockerfile
@@ -6,8 +6,7 @@ RUN apk add --no-cache py-pip unzip
 RUN mkdir /tmp/indico-pip && \
     pip download --no-deps -d /tmp/indico-pip indico && \
     unzip /tmp/indico-pip/indico-*.whl -d /srv/ 'indico/web/static/*' && \
-    rm -rf /tmp/indico-pip && \
-    mkdir -p /srv/indico/web/custom
+    rm -rf /tmp/indico-pip
 
 RUN rm /etc/nginx/conf.d/default.conf
 COPY indico.conf /etc/nginx/conf.d/indico.conf