Some fixes for new libs shading

worldedit-core/build.gradle

@@ -1,5 +1,3 @@
-import com.github.jengelman.gradle.plugins.shadow.tasks.ShadowJar
-
 apply plugin: 'eclipse'
 apply plugin: 'idea'
 
@@ -28,8 +26,3 @@ sourceSets {
         }
     }
 }
-
-task jar(type: ShadowJar, overwrite: true) {
-    from sourceSets.main.output
-    configurations = [project.configurations.runtime]
-}