diff --git a/libbuild/J7Zip-modified/build.gradle b/libbuild/J7Zip-modified/build.gradle
deleted file mode 100644
index 3599cb594..000000000
--- a/libbuild/J7Zip-modified/build.gradle
+++ /dev/null
@@ -1,72 +0,0 @@
-
-plugins {
-    id 'java-library'
-    id 'maven-publish'
-}
-
-/** Port of older support library to be build with Gradle
-previous Maven Info
-    <groupId>net.yacy.extlib</groupId>
-    <artifactId>J7Zip-modified</artifactId>
-    <packaging>jar</packaging>
-    <version>1.02</version>
-    <description>J7Zip library for YaCy sevenzipParser (not available in external maven repository)</description>
-*/
-
-sourceSets {
-    main {
-        java {
-            srcDirs = ['src']
-        }
-    }
-}
-
-version = '1.0.2'
-group = 'net.yacy.extlib'
-
-publishing {
-    publications {
-        mavenJava(MavenPublication) {
-            artifactId = 'J7Zip-modified'
-            from components.java
-            versionMapping {
-                usage('java-api') {
-                    fromResolutionOf('runtimeClasspath')
-                }
-                usage('java-runtime') {
-                    fromResolutionResult()
-                }
-            }
-            pom {
-                name = 'J7Zip'
-                description = 'J7Zip library for YaCy sevenzipParser (not available in external maven repository)'
-                licenses {
-                    license {
-                        name = 'GNU Lesser General Public License 2.1'
-                        url = 'http://www.gnu.org/licenses/lgpl-2.1.txt'
-                    }
-                }
-                scm {
-                    connection = 'scm:git:https://github.com/yacy/yacy_search_server.git'
-                    url = 'https://github.com/yacy/yacy_search_server'
-                }
-            }
-        }
-    }
-    repositories {
-        maven {
-            // change URLs to point to your repos, e.g. http://my.org/repo
-            def releasesRepoUrl = layout.buildDirectory.dir('repos/releases')
-        }
-    }
-}
-
-// copy jar to yacycore /lib directory (used as dependencies)
-task installJarToRoot (type: Copy, dependsOn: jar) {
-    from jar.archiveFile
-    into "${projectDir.getParent()}/../lib"
-    doLast {
-        logger.lifecycle ("copied jar to ${projectDir.getParent()}/../lib/" + jar.archiveFileName.get())
-    }
-}
-