fix: do not delete application form once used

We want members to use the same application form when applying for roles
instead of removing it once it gets used. The command to generate a form
should be used once.

application/src/main/java/org/togetherjava/tjbot/features/basic/ApplicationCreateCommand.java

@@ -173,7 +173,6 @@ public void onStringSelectSelection(StringSelectInteractionEvent event, List<Str
             .addActionRow(ActionRow.of(body).getComponents())
             .build();
 
-        event.getHook().deleteOriginal().queue();
         event.replyModal(modal).queue();
     }