JavaDoc fixes

Remove duplicate JavaDocs - At some point upstream decided to fix some of their JD errors/warnings, so now we have duplicate tags, bringing new warnings.
Also add missing `@param` for ItemStack.deserializeBytes

Spigot-API-Patches/0206-Add-Raw-Byte-ItemStack-Serialization.patch

@@ -20,10 +20,10 @@ index 541e28a9bece0beb0c2cf02c39030840b758c6e6..d3ec5084e33dff038d54cdd2aeb703a3
      // Paper end
  }
 diff --git a/src/main/java/org/bukkit/inventory/ItemStack.java b/src/main/java/org/bukkit/inventory/ItemStack.java
-index d7d6a3e83dfd88359708749f5c12be02815c3580..ccd81fca25233c2a9c2a8c3f4dda3053d7b2e723 100644
+index d7d6a3e83dfd88359708749f5c12be02815c3580..4f2520f7a4ca6d57a85924ada1068a055b9a01fb 100644
 --- a/src/main/java/org/bukkit/inventory/ItemStack.java
 +++ b/src/main/java/org/bukkit/inventory/ItemStack.java
-@@ -613,6 +613,29 @@ public class ItemStack implements Cloneable, ConfigurationSerializable {
+@@ -613,6 +613,30 @@ public class ItemStack implements Cloneable, ConfigurationSerializable {
          return Bukkit.getServer().getItemFactory().ensureServerConversions(this);
      }
  
@@ -33,6 +33,7 @@ index d7d6a3e83dfd88359708749f5c12be02815c3580..ccd81fca25233c2a9c2a8c3f4dda3053
 +     *
 +     * This expects that the DataVersion was stored on the root of the Compound, as saved from
 +     * the {@link #serializeAsBytes()} API returned.
++     * @param bytes bytes representing an item in NBT
 +     * @return ItemStack migrated to this version of Minecraft if needed.
 +     */
 +    @NotNull