decorators/@autobind: Minor improvements.

src/decorators.js

@@ -31,25 +31,22 @@ export const autobind = (target, key, {
   enumerable,
 
   get () {
-    const bounded = bind(fn, this)
+    if (this === target) {
+      return fn
+    }
+
+    const bound = bind(fn, this)
 
     defineProperty(this, key, {
       configurable: true,
       enumerable: false,
-      value: bounded,
+      value: bound,
       writable: true
     })
 
-    return bounded
+    return bound
   },
   set (newValue) {
-    if (this === target) {
-      // New value directly set on the prototype.
-      delete this[key]
-      this[key] = newValue
-    } else {
-      // New value set on a child object.
-
     // Cannot use assignment because it will call the setter on
     // the prototype.
     defineProperty(this, key, {
@@ -59,7 +56,6 @@ export const autobind = (target, key, {
       writable: true
     })
   }
-  }
 })
 
 // -------------------------------------------------------------------