Revert "Fix Version"

This reverts commit d154e1d064.

gradle/libs.versions.toml

@@ -1,6 +1,6 @@
 [versions]
 # Minecraft expectations
-paper = "1.21.3-R0.1-SNAPSHOT"
+paper = "1.21-R0.1-SNAPSHOT"
 fastutil = "8.5.9"
 guava = "31.1-jre"
 log4j = "2.19.0"

worldedit-bukkit/src/test/java/com/sk89q/wepif/TestOfflinePermissible.java

@@ -376,9 +376,4 @@ public class TestOfflinePermissible implements OfflinePlayer, Permissible {
         return null;
     }
 
-    @Override
-    public @NotNull PersistentDataContainerView getPersistentDataContainer() {
-        return null;
-    }
-
 }