Revert docker install in OpenHands app image (#4519)

.github/workflows/ghcr-build.yml

@@ -88,14 +88,6 @@ jobs:
           hash_from_app_image=$(cat docker-outputs.txt | grep "Hash for docker build directory" | awk -F "): " '{print $2}' | uniq | head -n1)
           echo "hash_from_app_image=$hash_from_app_image" >> $GITHUB_OUTPUT
           echo "Hash from app image: $hash_from_app_image"
-      # This test should move when we have a test suite for the app image
-      - name: Test docker in App Image
-        run: |
-          # Lowercase the repository owner
-          export REPO_OWNER=${{ github.repository_owner }}
-          REPO_OWNER=$(echo $REPO_OWNER | tr '[:upper:]' '[:lower:]')
-
-          docker run -e SANDBOX_USER_ID=0 -v /var/run/docker.sock:/var/run/docker.sock ghcr.io/${REPO_OWNER}/openhands:${{ env.RELEVANT_SHA }} /bin/bash -c "docker run hello-world"
 
   # Builds the runtime Docker images
   ghcr_build_runtime:

containers/app/Dockerfile

@@ -46,14 +46,6 @@ RUN mkdir -p $WORKSPACE_BASE
 RUN apt-get update -y \
     && apt-get install -y curl ssh sudo
 
-# Install Docker - https://docs.docker.com/engine/install/debian/
-RUN apt-get install ca-certificates curl \
-    && curl -fsSL https://download.docker.com/linux/debian/gpg -o /etc/apt/keyrings/docker.asc \
-    && chmod a+r /etc/apt/keyrings/docker.asc \
-    && echo "deb [arch=$(dpkg --print-architecture) signed-by=/etc/apt/keyrings/docker.asc] https://download.docker.com/linux/debian bookworm stable" | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null \
-    && apt-get update \
-    && apt install -y docker-ce
-
 # Default is 1000, but OSX is often 501
 RUN sed -i 's/^UID_MIN.*/UID_MIN 499/' /etc/login.defs
 # Default is 60000, but we've seen up to 200000