remove unnecessary dependency

VadereSimulator/pom.xml

@@ -135,10 +135,5 @@
           <artifactId>meshing</artifactId>
           <version>${project.version}</version>
       </dependency>
-      <dependency>
-          <groupId>com.github.davidmoten</groupId>
-          <artifactId>rtree</artifactId>
-          <version>0.8.7</version>
-      </dependency>
   </dependencies>
 </project>