diff --git a/src/main/java/org/olat/core/commons/services/commentAndRating/ReadOnlyCommentsSecurityCallback.java b/src/main/java/org/olat/core/commons/services/commentAndRating/ReadOnlyCommentsSecurityCallback.java
index c449a173dc1882596fd10154157c8fd73509d58c..09609bac9892734f518e8f1f19c888863c1195c6 100644
--- a/src/main/java/org/olat/core/commons/services/commentAndRating/ReadOnlyCommentsSecurityCallback.java
+++ b/src/main/java/org/olat/core/commons/services/commentAndRating/ReadOnlyCommentsSecurityCallback.java
@@ -21,7 +21,6 @@ package org.olat.core.commons.services.commentAndRating;
 
 import java.util.List;
 
-import org.olat.core.commons.services.commentAndRating.CommentAndRatingSecurityCallback;
 import org.olat.core.commons.services.commentAndRating.model.UserComment;
 
 /**
diff --git a/src/main/java/org/olat/core/gui/media/StreamedMediaResource.java b/src/main/java/org/olat/core/gui/media/StreamedMediaResource.java
index 3bf0191b46a4017f0d292fb7b2fb187054e13893..c6d1bab45fc64cf248103425849762a3d3e7d01a 100644
--- a/src/main/java/org/olat/core/gui/media/StreamedMediaResource.java
+++ b/src/main/java/org/olat/core/gui/media/StreamedMediaResource.java
@@ -24,7 +24,6 @@ import java.io.InputStream;
 import javax.servlet.http.HttpServletResponse;
 
 import org.apache.commons.io.IOUtils;
-import org.olat.core.gui.media.MediaResource;
 import org.olat.core.util.StringHelper;
 
 /**
diff --git a/src/main/java/org/olat/core/util/vfs/filters/VFSSystemItemFilter.java b/src/main/java/org/olat/core/util/vfs/filters/VFSSystemItemFilter.java
index 118ab8e55a9c2ab6fd3ed11972826c32be291500..d9c2639628e94e8cb8504aebb10dd5654d7841b9 100644
--- a/src/main/java/org/olat/core/util/vfs/filters/VFSSystemItemFilter.java
+++ b/src/main/java/org/olat/core/util/vfs/filters/VFSSystemItemFilter.java
@@ -20,7 +20,6 @@
 package org.olat.core.util.vfs.filters;
 
 import org.olat.core.util.vfs.VFSItem;
-import org.olat.core.util.vfs.filters.VFSItemFilter;
 
 public class VFSSystemItemFilter implements VFSItemFilter {
 	
diff --git a/src/main/java/org/olat/core/util/vfs/filters/VFSVersionsItemFilter.java b/src/main/java/org/olat/core/util/vfs/filters/VFSVersionsItemFilter.java
index 484eaceb5f45d673bc69e3141de76e6f521c15f2..abc2b0a884a3f2b66930aaf777239eb39d0512be 100644
--- a/src/main/java/org/olat/core/util/vfs/filters/VFSVersionsItemFilter.java
+++ b/src/main/java/org/olat/core/util/vfs/filters/VFSVersionsItemFilter.java
@@ -20,7 +20,6 @@
 package org.olat.core.util.vfs.filters;
 
 import org.olat.core.util.vfs.VFSItem;
-import org.olat.core.util.vfs.filters.VFSItemFilter;
 
 /**
  *