Remove Deploy to GCP Button

The GCP button links to a step by step guide, and is not really a quick-start way to deploy the app.

It's fine to add it back in the `parse-server-example` repo itself, as well as it include it in our community links.

Author: hramos

README.md

@@ -12,7 +12,7 @@ Parse Server works with the Express web application framework. It can be added t
 
 We have provided a basic [Node.js application](https://github.com/ParsePlatform/parse-server-example) that uses the Parse Server module on Express and can be easily deployed using any of the following buttons:
 
-<a title="Deploy to AWS" href="https://console.aws.amazon.com/elasticbeanstalk/home?region=us-west-2#/newApplication?applicationName=ParseServer&solutionStackName=Node.js&tierName=WebServer&sourceBundleUrl=https://s3.amazonaws.com/elasticbeanstalk-samples-us-east-1/eb-parse-server-sample/parse-server-example.zip" target="_blank"><img src="http://d0.awsstatic.com/product-marketing/Elastic%20Beanstalk/deploy-to-aws.png" height="40"></a> <a title="Deploy to Heroku" href="https://heroku.com/deploy?template=https://github.com/parseplatform/parse-server-example" target="_blank"><img src="https://www.herokucdn.com/deploy/button.png"></a> <a title="Deploy to Azure" href="https://azuredeploy.net/?repository=https://github.com/parseplatform/parse-server-example" target="_blank"><img src="http://azuredeploy.net/deploybutton.png"></a> <a title="Deploy to GCP" href="https://cloud.google.com/nodejs/resources/frameworks/parse-server" target="_blank"><img src="https://gcpstatic.storage.googleapis.com/deploy%402x.png" height="36"></a>
+<a title="Deploy to AWS" href="https://console.aws.amazon.com/elasticbeanstalk/home?region=us-west-2#/newApplication?applicationName=ParseServer&solutionStackName=Node.js&tierName=WebServer&sourceBundleUrl=https://s3.amazonaws.com/elasticbeanstalk-samples-us-east-1/eb-parse-server-sample/parse-server-example.zip" target="_blank"><img src="http://d0.awsstatic.com/product-marketing/Elastic%20Beanstalk/deploy-to-aws.png" height="40"></a> <a title="Deploy to Heroku" href="https://heroku.com/deploy?template=https://github.com/parseplatform/parse-server-example" target="_blank"><img src="https://www.herokucdn.com/deploy/button.png"></a> <a title="Deploy to Azure" href="https://azuredeploy.net/?repository=https://github.com/parseplatform/parse-server-example" target="_blank"><img src="http://azuredeploy.net/deploybutton.png"></a>
 
 ### Parse Server + Express