Remove Java IDEA directory

No need to maintain it, the Java project can
be imported in IDEA using Gradle or Maven.

Author: acogoluegnes

README.md

@@ -37,10 +37,9 @@ The following ports are available:
  * [Haskell](./haskell)
  * [JavaScript (with Node and amqplib)](./javascript-nodejs) (using callbacks)
  * [JavaScript (with Node and amqplib)](https://github.com/amqp-node/amqplib) (using promises/futures)
+ * [Java](./java) (with manual dependency management)
  * [Java with Gradle](./java-gradle)
  * [Java with Maven](./java-mvn)
- * [Java (with IntelliJ IDEA)](./java-idea)
- * [Java](./java) (with manual dependency management)
  * [Kotlin](./kotlin)
  * [PHP (with php-amqplib)](./php)
  * [PHP (with php-amqp)](./php-amqp)