Remove nearly empty releng project

.gitlab-ci.yml

@@ -20,7 +20,7 @@ build:
     - cd ..
     - cp -r org.rodinp.handbook.feature/build/eclipse/* org.rodinp.handbook/
     - mvn -f org.rodinp.handbook.parent/pom.xml install
-    - cp org.rodinp.handbook.releng/index.html org.rodinp.handbook.repository/target/repository
+    - cp org.rodinp.handbook.repository/index.html org.rodinp.handbook.repository/target/repository
   artifacts:
     paths:
       - org.rodinp.handbook.feature/build/files

org.rodinp.handbook.releng/.project

-<?xml version="1.0" encoding="UTF-8"?>
-<projectDescription>
-	<name>org.rodinp.handbook.releng</name>
-	<comment></comment>
-	<projects>
-	</projects>
-	<buildSpec>
-	</buildSpec>
-	<natures>
-	</natures>
-</projectDescription>

org.rodinp.handbook.releng/settings.gradle

-include 'org.rodinp.handbook', 'org.rodinp.handbook.feature'
\ No newline at end of file