Remove lag from legacy Material support issue

Spigot pulls in all the legacy marerials if you loop through the
material values.

src/main/java/world/bentobox/greenhouses/greenhouse/Roof.java

@@ -23,11 +23,13 @@ import world.bentobox.greenhouses.world.AsyncWorldCache;
  * @author tastybento
  *
  */
+@SuppressWarnings("deprecation")
 public class Roof extends MinMaxXZ {
     private static final List<Material> ROOF_BLOCKS;
     static {
         // Roof blocks
         ROOF_BLOCKS = Arrays.stream(Material.values())
+                .filter(m -> !m.isLegacy())
                 .filter(Material::isBlock) // Blocks only, no items
                 .filter(m -> Tag.TRAPDOORS.isTagged(m) // All trapdoors
                         || (m.name().contains("GLASS") && !m.name().contains("GLASS_PANE")) // All glass blocks

src/main/java/world/bentobox/greenhouses/greenhouse/Walls.java

@@ -12,12 +12,14 @@ import world.bentobox.bentobox.BentoBox;
 import world.bentobox.greenhouses.Greenhouses;
 import world.bentobox.greenhouses.world.AsyncWorldCache;
 
+@SuppressWarnings("deprecation")
 public class Walls extends MinMaxXZ {
     private static final List<Material> WALL_BLOCKS;
     static {
         // Hoppers
         WALL_BLOCKS = Arrays.stream(Material.values())
                 .filter(Material::isBlock) // Blocks only, no items
+                .filter(m -> !m.isLegacy())
                 .filter(m -> !m.name().contains("TRAPDOOR")) // No trap doors
                 .filter(m -> m.name().contains("DOOR") // All doors
                         || (m.name().contains("GLASS") && !m.name().contains("GLASS_PANE")) // All glass blocks

src/main/java/world/bentobox/greenhouses/managers/GreenhouseManager.java

@@ -1,6 +1,10 @@
 package world.bentobox.greenhouses.managers;
 
-import java.util.*;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Objects;
+import java.util.Set;
 import java.util.concurrent.CompletableFuture;
 import java.util.stream.Collectors;