Remove 1.8 blocks/items patches

For those interested in these features, you can continue to use these patches in your own builds or use a plugin, such as Carbon, to add them

Spigot-Server-Patches/Backwards-compatible-PacketPlayOutEntityTeleport-con.patch

@@ -29,6 +29,4 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
      public void a(PacketDataSerializer packetdataserializer) {
          this.a = packetdataserializer.readInt();
          this.b = packetdataserializer.readInt();
--- 
-1.9.4.msysgit.0
-
+--