Cleanup Dockerfile + Manifest

Dockerfile

@@ -2,17 +2,12 @@ FROM ubuntu:17.04
 
 RUN apt-get update && \
     apt-get install --yes --no-install-recommends \
-            curl \
             python3 \
             python3-pip \
             python3-setuptools \
             git && \
     apt-get clean && apt-get purge
 
-# FIXME: Remove this if pip install with setup.py can do it instead?
-COPY install-s2i.bash /usr/local/bin/install-s2i.bash
-RUN /usr/local/bin/install-s2i.bash
-
 RUN mkdir /tmp/src
 ADD . /tmp/src
 RUN pip3 install --no-cache-dir /tmp/src

MANIFEST.in

@@ -1,7 +1,3 @@
-exclude repo2docker/s2i
-include Dockerfile
 include *.md
 include LICENSE
-include setup.cfg
-
-graft s2i-builders
+include setup.cfg