restored some anti cheat things for elytra, still applicable

src/main/java/carpet/mixins/PlayerEntity_antiCheatDisabled.java

@@ -0,0 +1,35 @@
+package carpet.mixins;
+
+import carpet.CarpetServer;
+import carpet.settings.CarpetSettings;
+import net.minecraft.entity.EquipmentSlot;
+import net.minecraft.entity.player.PlayerEntity;
+import net.minecraft.item.ElytraItem;
+import net.minecraft.item.ItemStack;
+import net.minecraft.item.Items;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Inject;
+import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
+
+@Mixin(PlayerEntity.class)
+public abstract class PlayerEntity_antiCheatDisabled
+{
+    @Shadow public abstract ItemStack getEquippedStack(EquipmentSlot equipmentSlot_1);
+
+    @Shadow public abstract void method_23669();
+
+    @Inject(method = "method_23668", at = @At("HEAD"), cancellable = true)
+    private void allowDeploys(CallbackInfoReturnable<Boolean> cir)
+    {
+        if (CarpetSettings.antiCheatDisabled && CarpetServer.minecraft_server.isDedicated())
+        {
+            ItemStack itemStack_1 = getEquippedStack(EquipmentSlot.CHEST);
+            if (itemStack_1.getItem() == Items.ELYTRA && ElytraItem.isUsable(itemStack_1)) {
+                method_23669();
+                cir.setReturnValue(true);
+            }
+        }
+    }
+}

src/main/resources/carpet.mixins.json

@@ -88,6 +88,7 @@
     "PistonBlock_rotatorBlockMixin",
 
     "ServerPlayNetworkHandler_antiCheatDisabledMixin",
+    "PlayerEntity_antiCheatDisabled",
 
     "PortalForcer_portalCachingMixin",
     "PortalBlock_portalCachingMixin",