refactor(cmd-client): improve print of help info

client/src/main/java/de/fitko/fitconnect/client/cmd/CommandLineClient.java

@@ -50,7 +50,6 @@ public class CommandLineClient {
     public void run(final String... args) throws IOException {
         final var parsedCommand = parseCommandFromArguments(args);
         if (parsedCommand == null) {
-            jc.usage();
             return;
         }
         executeCommand(parsedCommand);
@@ -76,7 +75,7 @@ public class CommandLineClient {
                 listOneSubmission(listOneSubmissionCommand);
                 break;
             default:
-                jc.usage();
+                break;
         }
     }