Remove unused Dockerfile (#9716)

scripts/ci/Dockerfile

@@ -1,69 +0,0 @@
-# Docker file for end-to-end tests
-
-# Update on docker hub with the following commands in the directory of this file:
-# If you're on linux amd64
-#   docker build -t vectorim/element-web-ci-e2etests-env:latest .
-# If you're on some other platform, you need to cross-compile
-#   docker buildx build --platform linux/amd64,linux/arm64 --push -t vectorim/element-web-ci-e2etests-env:latest .
-# Then:
-#   docker push vectorim/element-web-ci-e2etests-env:latest
-FROM node:14-buster
-RUN apt-get update
-RUN apt-get -y install \
-    build-essential \
-    jq \
-    libffi-dev \
-    libjpeg-dev \
-    libssl-dev \
-    libxslt1-dev \
-    python3-dev \
-    python-pip \
-    python-setuptools \
-    python-virtualenv \
-    sqlite3 \
-    uuid-runtime
-
-# dependencies for chrome (installed by puppeteer)
-RUN apt-get -y install \
-    ca-certificates \
-    fonts-liberation \
-    gconf-service \
-    libappindicator1 \
-    libasound2 \
-    libatk1.0-0 \
-    libatk-bridge2.0-0 \
-    libc6 \
-    libcairo2 \
-    libcups2 \
-    libdbus-1-3 \
-    libexpat1 \
-    libfontconfig1 \
-    libgbm-dev \
-    libgcc1 \
-    libgconf-2-4 \
-    libgdk-pixbuf2.0-0 \
-    libglib2.0-0 \
-    libgtk-3-0 \
-    libnspr4 \
-    libnss3 \
-    libpango-1.0-0 \
-    libpangocairo-1.0-0 \
-    libstdc++6 \
-    libx11-6 \
-    libx11-xcb1 \
-    libxcb1 \
-    libxcomposite1 \
-    libxcursor1 \
-    libxdamage1 \
-    libxext6 \
-    libxfixes3 \
-    libxi6 \
-    libxrandr2 \
-    libxrender1 \
-    libxss1 \
-    libxtst6 \
-    lsb-release \
-    wget \
-    xdg-utils
-
-RUN npm install -g typescript