Fix static and unused variable

git-svn-id: https://svn.apache.org/repos/asf/ant/core/trunk@270901 13f79535-47bb-0310-9956-ffa450edef68

src/main/org/apache/tools/ant/taskdefs/SignJar.java

@@ -187,7 +187,7 @@ public class SignJar extends Task {
     }
 
     private void doOneJar(File jarSource, File jarTarget) throws BuildException {
-        if (project.getJavaVersion().equals(Project.JAVA_1_1)) {
+        if (Project.getJavaVersion().equals(Project.JAVA_1_1)) {
             throw new BuildException("The signjar task is only available on JDK versions 1.2 or greater");
         }
 
@@ -203,8 +203,6 @@ public class SignJar extends Task {
           return;
         }
 
-        final StringBuffer sb = new StringBuffer();
-
         final ExecTask cmd = (ExecTask) project.createTask("exec");
         cmd.setExecutable("jarsigner");