Remove Paper's UnsafeUtils (#4913)

Spigot-API-Patches/Use-ASM-for-event-executors.patch

@@ -185,7 +185,6 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 @@ -0,0 +0,0 @@
 +package com.destroystokyo.paper.event.executor.asm;
 +
-+import com.destroystokyo.paper.utils.UnsafeUtils;
 +import org.jetbrains.annotations.NotNull;
 +
 +public interface ClassDefiner {
@@ -290,47 +289,6 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +        }
 +    }
 +}
-diff --git a/src/main/java/com/destroystokyo/paper/utils/UnsafeUtils.java b/src/main/java/com/destroystokyo/paper/utils/UnsafeUtils.java
-new file mode 100644
-index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000
---- /dev/null
-+++ b/src/main/java/com/destroystokyo/paper/utils/UnsafeUtils.java
-@@ -0,0 +0,0 @@
-+package com.destroystokyo.paper.utils;
-+
-+import org.jetbrains.annotations.Nullable;
-+import sun.misc.Unsafe;
-+
-+import java.lang.reflect.Field;
-+
-+public class UnsafeUtils {
-+    private UnsafeUtils() {}
-+
-+    private static final Unsafe UNSAFE;
-+    static {
-+        Unsafe unsafe;
-+        try {
-+            Class c = Class.forName("sun.misc.Unsafe");
-+            Field f = c.getDeclaredField("theUnsafe");
-+            f.setAccessible(true);
-+            unsafe = (Unsafe) f.get(null);
-+        } catch (ClassNotFoundException | NoSuchFieldException | SecurityException e) {
-+            unsafe = null;
-+        } catch (IllegalAccessException e) {
-+            throw new AssertionError(e);
-+        }
-+        UNSAFE = unsafe;
-+    }
-+
-+    public static boolean isUnsafeSupported() {
-+        return UNSAFE != null;
-+    }
-+
-+    @Nullable
-+    public static Unsafe getUnsafe() {
-+        return UNSAFE;
-+    }
-+}
 diff --git a/src/main/java/org/bukkit/plugin/EventExecutor.java b/src/main/java/org/bukkit/plugin/EventExecutor.java
 index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
 --- a/src/main/java/org/bukkit/plugin/EventExecutor.java