chore: remove screenshot testing (#12155)

Removes the screenshot test tool since Angular Material is visually being tested inside of Google.

scripts/deploy/deploy-screenshot-tool.sh

@@ -1,41 +0,0 @@
-#!/bin/bash
-
-# The script should immediately exit if any command in the script fails.
-set -e
-
-# This script deploys the Screenshot Tool and their Cloud Functions to Firebase.
-# Before deploying, the script installs all dependencies of the functions and builds the app.
-
-# Go to the project root directory
-cd $(dirname ${0})/../..
-
-if [ -z ${MATERIAL2_SCREENSHOT_FIREBASE_DEPLOY_TOKEN} ]; then
-  echo "Error: No access token for firebase specified." \
-       "Please set the environment variable 'MATERIAL2_SCREENSHOT_FIREBASE_DEPLOY_TOKEN'."
-  exit 1
-fi
-
-# Path to the screenshot tool in the project.
-screenshotToolFolder="tools/screenshot-test"
-
-# Path to the firebase binary of the root package.json
-firebaseBin=$(npm bin)/firebase
-
-# Go to the screenshot-test folder because otherwise Firebase tries to deploy the wrong project.
-cd ${screenshotToolFolder}
-
-# Install node_modules for the application and afterwards build the application in production.
-(npm install; $(npm bin)/ng build --aot -prod) &
-
-# Install node modules for screenshot-tool functions. Firebase CLI needs to execute the functions
-# to collect all function names before it can deploy them.
-(cd functions; npm install) &
-
-# The screenshot application is being built asynchronously. Also the dependencies for the
-# Cloud Functions are built asynchronously. This means that the script needs to wait for all
-# async tasks to finish before proceeding.
-wait
-
-# Deploy the screenshot application and their functions to Firebase
-${firebaseBin} deploy --token ${MATERIAL2_SCREENSHOT_FIREBASE_DEPLOY_TOKEN} --non-interactive \
-  --project material2-screenshots