Remove dependencyManagement node of the generated POM file

Closes gh-4

build.gradle

@@ -112,6 +112,28 @@ publishing {
                     url = 'https://github.com/graceframework/grace-geb'
                 }
             }
+
+            pom.withXml {
+                def pomNode = asNode()
+                try {
+                    pomNode.dependencyManagement.replaceNode {}
+                } catch (Throwable e) {
+                    // ignore
+                }
+
+                // simply remove dependencies without a version
+                // version-less dependencies are handled with dependencyManagement
+                // see https://github.com/spring-gradle-plugins/dependency-management-plugin/issues/8 for more complete solutions
+                pomNode.dependencies.dependency.findAll {
+                    it.version.text().isEmpty()
+                }.each {
+                    try {
+                        it.replaceNode {}
+                    } catch (Throwable e) {
+                        // ignore
+                    }
+                }
+            }
         }
     }
 }