Merge pull request #191 from sdeleuze/remove-idea-gradle-plugin

* pr/191:
  Remove the now deprecated IDEA Gradle plugin

initializr/src/main/resources/templates/starter-build.gradle

@@ -16,7 +16,6 @@ buildscript {
 apply plugin: '${language}'<% if (packaging=='war') {  %>
 apply plugin: 'eclipse-wtp'<% } else { %>
 apply plugin: 'eclipse'<% } %>
-apply plugin: 'idea'
 apply plugin: 'spring-boot' <% if (!bootOneThreeAvailable) { %>
 apply plugin: 'io.spring.dependency-management' <% } %><% if (packaging=='war') {  %>
 apply plugin: 'war'