fix(minecraft-crossplay): Java port is not a setting

Nodes always publish container port 25565, so an owner-set SERVER_PORT made Java Edition unreachable. The image already defaults to 25565; the status ping uses pingPort 25565 instead of reading the setting.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

games/minecraft-crossplay/game.yaml

@@ -40,7 +40,6 @@ defaultConfig:
   PVP: true
   RCON_PASSWORD: ""
   RCON_PORT: 25575
-  SERVER_PORT: 25565
   TYPE: PAPER
   USE_AIKAR_FLAGS: true
   VERSION: LATEST
@@ -181,12 +180,6 @@ configSchema:
       description: TCP port for remote console. Only reachable from the host node (not published publicly); GBR uses it for actions and player moderation.
       title: RCON Port
       type: integer
-    SERVER_PORT:
-      category: System & General
-      default: 25565
-      description: The TCP network port on which Java Edition Minecraft players connect.
-      title: Java Server Port
-      type: integer
     TYPE:
       category: System & General
       default: PAPER
@@ -362,7 +355,7 @@ agnosticCommandConfig:
   joinButtonLabel: How to Join
   joinModalTitle: How to Join This Server
   pingPort: 25565
-  pingPortKey: SERVER_PORT
+  pingPortKey: null
   playerJoinRegex: :\s+([a-zA-Z0-9_.*]+) joined the game
   playerLeaveRegex: :\s+([a-zA-Z0-9_.*]+) left the game
   playersCommand: null