Revert "Install container pilot on image-server"

This reverts commit b95b7d0.

Dockerfile

@@ -6,26 +6,10 @@ RUN mkdir -p $app
 WORKDIR $app
 
 RUN apk update
-RUN apk add imagemagick curl vim
+RUN apk add imagemagick curl
 RUN curl -o $app/images http://us-east.manta.joyent.com/wanelo/public/images/bin/images-linux-1.13.11 && chmod +x $app/images
 
-# Add Containerpilot and set its configuration
-ENV CONTAINERPILOT_VERSION 2.7.0
-ENV CONTAINERPILOT file:///etc/containerpilot.json
-
-RUN export CONTAINERPILOT_CHECKSUM=687f7d83e031be7f497ffa94b234251270aee75b \
-    && export archive=containerpilot-${CONTAINERPILOT_VERSION}.tar.gz \
-    && curl -Lso /tmp/${archive} \
-         "https://github.com/joyent/containerpilot/releases/download/${CONTAINERPILOT_VERSION}/${archive}" \
-    && echo "${CONTAINERPILOT_CHECKSUM}  /tmp/${archive}" | sha1sum -c \
-    && tar zxf /tmp/${archive} -C /usr/local/bin \
-    && rm /tmp/${archive}
-
-# configuration files and bootstrap scripts
-COPY etc/containerpilot.json /etc/
-COPY bin/health.sh /usr/local/bin/health.sh
-
-CMD /usr/local/bin/containerpilot $app/images --outputs='' --listen 0.0.0.0 server
+CMD $app/images --outputs='' --listen 0.0.0.0 server
 
 EXPOSE 7000 7002