Remove "Auto fix bad Y levels on player login" patch

Fixes #6357
Closes #6508
Closes #6358

patches/server/0192-Add-method-to-open-already-placed-sign.patch

@@ -0,0 +1,28 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Mark Vainomaa <mikroskeem@mikroskeem.eu>
+Date: Sun, 1 Apr 2018 02:29:37 +0300
+Subject: [PATCH] Add method to open already placed sign
+
+
+diff --git a/src/main/java/org/bukkit/craftbukkit/entity/CraftHumanEntity.java b/src/main/java/org/bukkit/craftbukkit/entity/CraftHumanEntity.java
+index 54947f02f29dd3dc546ee0d0f4600630242f003d..f1b1d1881d0598503a7ec1022ef5e00f848fb247 100644
+--- a/src/main/java/org/bukkit/craftbukkit/entity/CraftHumanEntity.java
++++ b/src/main/java/org/bukkit/craftbukkit/entity/CraftHumanEntity.java
+@@ -610,6 +610,17 @@ public class CraftHumanEntity extends CraftLivingEntity implements HumanEntity {
+         }
+     }
+ 
++    // Paper start - Add method to open already placed sign
++    @Override
++    public void openSign(org.bukkit.block.Sign sign) {
++        org.apache.commons.lang.Validate.isTrue(sign.getWorld().equals(this.getWorld()), "Sign must be in the same world as player is in");
++        org.bukkit.craftbukkit.block.CraftSign craftSign = (org.bukkit.craftbukkit.block.CraftSign) sign;
++        net.minecraft.world.level.block.entity.SignBlockEntity teSign = craftSign.getTileEntity();
++        // Make sign editable temporarily, will be set back to false in PlayerConnection later
++        teSign.isEditable = true;
++        this.getHandle().openTextEdit(teSign);
++    }
++    // Paper end
+     @Override
+     public boolean dropItem(boolean dropAll) {
+         if (!(this.getHandle() instanceof ServerPlayer)) return false;