fix: remove obsolete Hortonworks repositories

Following solution hail-is/hail#9418 that simply
removes affected repositories.

build.gradle

@@ -250,12 +250,6 @@ subprojects {
             maven {
                 url "https://repository.cloudera.com/artifactory/cloudera-repos/"
             }
-            maven {
-                url "https://repo.hortonworks.com/content/repositories/releases/"
-            }
-            maven {
-                url "https://repo.hortonworks.com/content/repositories/jetty-hadoop/"
-            }
             maven {
                 url "https://repository.mapr.com/maven/"
             }