Remove unnecessarily complicated code. am: 634f84fed4 am: 8817ca370b am: 983714d6fe

Original change: https://android-review.googlesource.com/c/platform/system/libhwbinder/+/2000112

Change-Id: Ia13f5668444757ff1acf05d8d981a1c2257dfa11
diff --git a/Binder.cpp b/Binder.cpp
index b90639f..6d26414 100644
--- a/Binder.cpp
+++ b/Binder.cpp
@@ -129,20 +129,12 @@
         }
     }
 
-    status_t err = NO_ERROR;
-    switch (code) {
-        default:
-            err = onTransact(code, data, reply, flags,
-                    [&](auto &replyParcel) {
-                        replyParcel.setDataPosition(0);
-                        if (callback != nullptr) {
-                            callback(replyParcel);
-                        }
-                    });
-            break;
-    }
-
-    return err;
+    return onTransact(code, data, reply, flags, [&](auto& replyParcel) {
+      replyParcel.setDataPosition(0);
+      if (callback != nullptr) {
+        callback(replyParcel);
+      }
+    });
 }
 
 status_t BHwBinder::linkToDeath(