Rewrite based on code from the GitHub Dependency Graph Gradle Plugin

fixtures/dependency/snapshot-redirect/groovy/build.gradle

@@ -3,10 +3,9 @@ plugins {
 }
 
 repositories {
-    jcenter()
     maven { url 'https://jitpack.io' }
 }
 
 dependencies {
     implementation 'com.github.anuken:packr:-SNAPSHOT'
-}
+}