Fix event

src/main/java/emu/grasscutter/server/event/game/ServerTickEvent.java

@@ -3,8 +3,6 @@ package emu.grasscutter.server.event.game;
 import emu.grasscutter.server.event.types.ServerEvent;
 import java.time.Instant;
 
-import java.time.Instant;
-
 public final class ServerTickEvent extends ServerEvent {
     private final Instant start, end;
 
@@ -22,12 +20,4 @@ public final class ServerTickEvent extends ServerEvent {
     public Instant getTickEnd() {
         return this.end;
     }
-
-    public Instant getTickStart() {
-        return this.start;
-    }
-
-    public Instant getTickEnd() {
-        return this.end;
-    }
 }
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