[JENKINS-19473] Removing workaround since root bug should be fixed in jzlib 1.1.3.

core/pom.xml

@@ -583,6 +583,12 @@ THE SOFTWARE.
         <groupId>com.google.guava</groupId>
         <artifactId>guava</artifactId>
       </dependency>
+    <!-- TODO overridden until Stapler 1.220 -->
+    <dependency>
+      <groupId>com.jcraft</groupId>
+      <artifactId>jzlib</artifactId>
+      <version>1.1.3</version>
+    </dependency>
   </dependencies>
 
   <build>

core/src/main/java/hudson/FilePath.java

@@ -635,12 +635,7 @@ public final class FilePath implements Serializable {
                 }
             }
             public OutputStream compress(OutputStream out) throws IOException {
-                return new GZIPOutputStream(new BufferedOutputStream(out),
-                        // TODO JENKINS-19473 workaround; replace when jzlib fixed
-                        new com.jcraft.jzlib.Deflater(6, 15+16, 9),   // use 9 for memLevel
-                        512,
-                        true
-                );
+                return new GZIPOutputStream(new BufferedOutputStream(out));
             }
         };