src/main/java/org/jenkinsci/plugins/gitclient/JGitAPIImpl.java: drop duplicate comment from upstream changes

Signed-off-by: Evgeny Klimov <klimov@provys.com>

Author: jimklimov

src/main/java/org/jenkinsci/plugins/gitclient/JGitAPIImpl.java

@@ -1738,7 +1738,6 @@ public void execute() throws GitException {
                                                     .getAbsolutePath()
                                                     .replace('\\', '/');
                                             listener.getLogger().println("Using reference repository: " + reference);
-                                            // git implementations on windows also use
                                             try (PrintWriter w = new PrintWriter(alternates, StandardCharsets.UTF_8)) {
                                                 // git implementations on windows also use
                                                 w.print(absoluteReference);