Delete azure-pipelines.yml

Not sure why we had this file anyway, neither is Rob

azure-pipelines.yml

@@ -1,21 +0,0 @@
-# Node.js with webpack
-# Build a Node.js project using the webpack CLI.
-# Add steps that analyze code, save build artifacts, deploy, and more:
-# https://docs.microsoft.com/azure/devops/pipelines/languages/javascript
-
-pool:
-  vmImage: 'Ubuntu 16.04'
-
-steps:
-- task: NodeTool@0
-  inputs:
-    versionSpec: '8.x'
-  displayName: 'Install Node.js'
-
-- script: |
-    npm i -g typescript
-    npm install
-    npm run build
-    npm run build_parser
-    npx webpack --config webpack.config.js
-  displayName: 'npm install, run webpack'