Revert "add Maven core documentation urls for older releases"

This reverts commit 1055d82d11289c53d287e1c14352fb7269554fe6.
diff --git a/src/main/resources/dist-tool.conf b/src/main/resources/dist-tool.conf
index 80bc437..3f3b364 100644
--- a/src/main/resources/dist-tool.conf
+++ b/src/main/resources/dist-tool.conf
@@ -59,15 +59,10 @@
 ##   apache-maven [2.2,3.0-alpha-1)

 

 /maven-3: org.apache.maven src+bin

- > apache-maven:3.0.5 site = https://maven.apache.org/ref/3.0.5/

   apache-maven [3.0,3.1.0-alpha-1)

- > apache-maven:3.1.1 site = https://maven.apache.org/ref/3.1.1/

   apache-maven [3.1.0,3.2.0-alpha-1)

- > apache-maven:3.2.5 site = https://maven.apache.org/ref/3.2.5/

   apache-maven [3.2.0,3.3.0-alpha-1)

- > apache-maven:3.3.9 site = https://maven.apache.org/ref/3.3.9/

   apache-maven [3.3.0,3.4.0-alpha-1)

- > apache-maven:3.5.4 site = https://maven.apache.org/ref/3.5.4/

   apache-maven [3.5.0,3.6.0-alpha-1)

   apache-maven