Remove unused methods before unused arguments

Fixes #99, which was caused by a method call in an unused method with a
non-constant dummy argument. This prevented the argument being removed,
but it wasn't obvious why as the method preventing the argument removal
was also removed.

deob/src/main/java/dev/openrs2/deob/Deobfuscator.kt

@@ -157,8 +157,8 @@ class Deobfuscator(private val input: Path, private val output: Path) {
             RemapTransformer(),
             ConstantArgTransformer(),
             UnusedLocalTransformer(),
-            UnusedArgTransformer(),
             UnusedMethodTransformer(),
+            UnusedArgTransformer(),
             CounterTransformer(),
             ResetTransformer(),
             ClassLiteralTransformer(),