LfsSshAuth: Remove redundant 'throws' declaration

UnloggedFailure is a subclass of Failure, which is already declared.

Change-Id: I6db3c2f3a381f557d580c50af314292a039518c7

src/main/java/com/googlesource/gerrit/plugins/lfs/auth/LfsSshAuth.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/lfs/auth/LfsSshAuth.java b/src/main/java/com/googlesource/gerrit/plugins/lfs/auth/LfsSshAuth.java
index 9fd57b9..3dd7a86 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/lfs/auth/LfsSshAuth.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/lfs/auth/LfsSshAuth.java
@@ -44,7 +44,7 @@
   }
 
   @Override
-  public String authenticate(CurrentUser user, List<String> args) throws UnloggedFailure, Failure {
+  public String authenticate(CurrentUser user, List<String> args) throws Failure {
     if (args.size() != 2) {
       throw new UnloggedFailure(1, "Unexpected number of arguments");
     }