Remove unneeded dependencies since this is included with modern Gradle

build.gradle

@@ -1,12 +1,3 @@
-buildscript {
-    repositories {
-        jcenter()
-    }
-    dependencies {
-        classpath 'com.github.jengelman.gradle.plugins:shadow:2.0.4'
-    }
-}
-
 plugins {
     id 'java'
     id 'com.github.johnrengelman.shadow' version '2.0.4'