diff --git a/core/src/main/java/hudson/util/IOUtils.java b/core/src/main/java/hudson/util/IOUtils.java
index 1155046e18..7bb9121661 100644
--- a/core/src/main/java/hudson/util/IOUtils.java
+++ b/core/src/main/java/hudson/util/IOUtils.java
@@ -152,49 +152,11 @@ public class IOUtils {
         }
     }
 
-
-    /**
-     * @deprecated Use instead {@link org.apache.commons.io.IOUtils#DIR_SEPARATOR_UNIX}
-     */
-    @Deprecated
-    public static final char DIR_SEPARATOR_UNIX       = org.apache.commons.io.IOUtils.DIR_SEPARATOR_UNIX;
-
-    /**
-     * @deprecated Use instead {@link org.apache.commons.io.IOUtils#DIR_SEPARATOR_WINDOWS}
-     */
-    @Deprecated
-    public static final char DIR_SEPARATOR_WINDOWS    = org.apache.commons.io.IOUtils.DIR_SEPARATOR_WINDOWS;
-
-    /**
-     * @deprecated Use instead {@link org.apache.commons.io.IOUtils#DIR_SEPARATOR}
-     */
-    @Deprecated
-    public static final char DIR_SEPARATOR            = org.apache.commons.io.IOUtils.DIR_SEPARATOR;
-
-    /**
-     * @deprecated Use instead {@link org.apache.commons.io.IOUtils#LINE_SEPARATOR_UNIX}
-     */
-    @Deprecated
-    public static final String LINE_SEPARATOR_UNIX    = org.apache.commons.io.IOUtils.LINE_SEPARATOR_UNIX;
-
-    /**
-     * @deprecated Use instead {@link org.apache.commons.io.IOUtils#LINE_SEPARATOR_WINDOWS}
-     */
-    @Deprecated
-    public static final String LINE_SEPARATOR_WINDOWS = org.apache.commons.io.IOUtils.LINE_SEPARATOR_WINDOWS;
-
-    /**
-     * @deprecated Use instead {@link org.apache.commons.io.IOUtils#LINE_SEPARATOR}
-     */
-    @Deprecated
-    public static final String LINE_SEPARATOR;
-
     static {
         // avoid security issues
         StringWriter buf = new StringWriter(4);
         PrintWriter out = new PrintWriter(buf);
         out.println();
-        LINE_SEPARATOR = buf.toString();
     }
 
     /**
diff --git a/core/src/main/resources/META-INF/upgrade/IOUtils.hint b/core/src/main/resources/META-INF/upgrade/IOUtils.hint
index bfbaf27a94..bc995ed09a 100644
--- a/core/src/main/resources/META-INF/upgrade/IOUtils.hint
+++ b/core/src/main/resources/META-INF/upgrade/IOUtils.hint
@@ -1,10 +1,4 @@
 <!description="PRs #1135, #1138: use IOUtils from Apache commons">
-hudson.util.IOUtils.DIR_SEPARATOR_UNIX => org.apache.commons.io.IOUtils.DIR_SEPARATOR_UNIX;;
-hudson.util.IOUtils.DIR_SEPARATOR_WINDOWS => org.apache.commons.io.IOUtils.DIR_SEPARATOR_WINDOWS;;
-hudson.util.IOUtils.DIR_SEPARATOR => org.apache.commons.io.IOUtils.DIR_SEPARATOR;;
-hudson.util.IOUtils.LINE_SEPARATOR_UNIX => org.apache.commons.io.IOUtils.LINE_SEPARATOR_UNIX;;
-hudson.util.IOUtils.LINE_SEPARATOR_WINDOWS => org.apache.commons.io.IOUtils.LINE_SEPARATOR_WINDOWS;;
-hudson.util.IOUtils.LINE_SEPARATOR => org.apache.commons.io.IOUtils.LINE_SEPARATOR;;
 hudson.util.IOUtils.closeQuietly($args$) => org.apache.commons.io.IOUtils.closeQuietly($args$);;
 hudson.util.IOUtils.toByteArray($args$) => org.apache.commons.io.IOUtils.toByteArray($args$);;
 hudson.util.IOUtils.toCharArray($args$) => org.apache.commons.io.IOUtils.toCharArray($args$);;