Remove IntelliJ > 2016.02 from supported IDEs

IntelliJ 2016.03 isn't supported as dev environment for
Gerrit. It is much better to be more restrictive in our
docs and avoid people trying to make it work where it
wouldn't.

Change-Id: I2d65ea5e77713e974a19b408d4fb9e7e711985ec
diff --git a/Documentation/dev-intellij.txt b/Documentation/dev-intellij.txt
index f7e0987..1fe912a 100644
--- a/Documentation/dev-intellij.txt
+++ b/Documentation/dev-intellij.txt
@@ -1,7 +1,7 @@
 = Gerrit Code Review - IntelliJ Setup
 
 == Prerequisites
-You need an installation of IntelliJ of version 2016.2 or newer.
+You need an installation of IntelliJ of version 2016.2.
 
 In addition, Java 8 must be specified on your path or via `JAVA_HOME` so that
 building with Bazel via the Bazel plugin is possible.