Remove unused chat message properties

Deleted redundant chat message properties and their translations. This cleanup enhances readability and maintains consistency across locale files.

src/main/resources/tweaks.properties

@@ -81,10 +81,4 @@ broadcast.format=<red>Server <gray>| <message>
 broadcast.footer=<reset>
 motd.changed=<prefix> <white>Changed motd to <green><motd>
 chat.format=<delete><player_prefix><click:suggest_command:'/msg <player> '><player><reset> <dark_gray>» <reset><click:copy_to_clipboard:'<message_content>'><hover:show_text:'<lang:chat.copy.click>'><message>
-chat.format.delete=<hover:show_text:'Click to delete this message'><dark_gray>[<dark_red><bold>x</bold><dark_gray>] <reset>
-command.usage.msg=<prefix> <red>/msg <dark_gray>[<gold>player<dark_gray>] <dark_gray>[<gold>message<dark_gray>]
-command.usage.reply=<prefix> <red>/reply <dark_gray>[<gold>message<dark_gray>]
-message.out=<italic><gray>You <dark_gray>-> <gray><receiver> <dark_gray>» <gray><message>
-message.in=<italic><gray><hover:show_text:'Click to reply'><click:suggest_command:'/msg <sender> '><sender></click></hover> <dark_gray>-> <gray>You <dark_gray>» <gray><hover:show_text:'<lang:chat.copy.click>'><click:copy_to_clipboard:'<message>'><message>
-message.self=<prefix> <red>You can't message yourself
-conversation.running=<prefix> <red>You have no running conversation
+chat.format.delete=<hover:show_text:'Click to delete this message'><dark_gray>[<dark_red><bold>x</bold><dark_gray>] <reset>

src/main/resources/tweaks_german.properties

@@ -74,8 +74,4 @@ god.active.others=<prefix> <green><player> <white>ist jetzt unverwundbar
 god.inactive.self=<prefix> <white>Du bist nicht länger unverwundbar
 god.inactive.others=<prefix> <green><player> <white>ist nicht länger unverwundbar
 chat.format.delete=<hover:show_text:'Klicke um diese Nachricht zu löschen'><dark_gray>[<dark_red><bold>x</bold><dark_gray>] <reset>
-motd.changed=<prefix> <white>Die motd ist jetzt <green><motd>
-message.out=<italic><gray>Du <dark_gray>-> <gray><receiver> <dark_gray>» <gray><message>
-message.in=<italic><gray><hover:show_text:'Klicke um zu Antworten'><click:suggest_command:'/msg <sender> '><sender></click></hover> <dark_gray>-> <gray>Dir <dark_gray>» <gray><hover:show_text:'<lang:chat.copy.click>'><click:copy_to_clipboard:'<message>'><message>
-message.self=<prefix> <red>Du kannst dir nicht selber schreiben
-conversation.running=<prefix> <red>Du hast keine laufende Konversation
+motd.changed=<prefix> <white>Die motd ist jetzt <green><motd>