ZmtBasePlugin.groovy: removed deprecated annotation

src/main/groovy/de/zmt/gradle/ZmtBasePlugin.groovy

@@ -7,7 +7,6 @@ import org.gradle.api.*
  * <p>
  * Sets up dochost repository, project group and version.
  */
-@Deprecated
 class ZmtBasePlugin implements Plugin<Project> {
     private static final def CONFIGURE = {
         repositories {