Remove custom [[HasInstance]] behaviors

This was only ever implemented in Firefox for most platform interface objects. It was added in 5982ce7. after being removed as a result of https://www.w3.org/Bugs/Public/show_bug.cgi?id=12295.

The behavior for callback interface objects was never implemented anywhere.

Closes #129.

index.bs

@@ -140,7 +140,6 @@ urlPrefix: https://tc39.github.io/ecma262/; spec: ECMA-262
         text: 9.3.1; url: sec-built-in-function-objects-call-thisargument-argumentslist
         text: ECMA-262 section 9.1.8; url: sec-ordinary-object-internal-methods-and-internal-slots-get-p-receiver
         text: ECMA-262 section 19.2.2.3; url: sec-function-@@create
-        text: ECMA-262 section 19.2.3.8; url: sec-function.prototype-@@hasinstance
         text: Array methods; url: sec-properties-of-the-array-prototype-object
         text: typed arrays; url: sec-typedarray-objects
         text: GetMethod; url: sec-getmethod
@@ -6389,9 +6388,8 @@ more of the following are redefined in accordance with the rules for exotic obje
 \[[Call]],
 \[[Set]],
 \[[DefineOwnProperty]],
-\[[GetOwnProperty]],
-\[[Delete]] and
-\[[HasInstance]].
+\[[GetOwnProperty]], and
+\[[Delete]].
 
 Other specifications may override the definitions
 of any internal method of a [=platform object=]
@@ -6431,7 +6429,6 @@ it has characteristics as follows:
     [=%FunctionPrototype%=] unless otherwise specified.
 *   Its \[[Get]] internal property is set as described in [=ECMA-262 section 9.1.8=].
 *   Its \[[Construct]] internal property is set as described in [=ECMA-262 section 19.2.2.3=].
-*   Its @@hasInstance property is set as described in [=ECMA-262 section 19.2.3.8=], unless otherwise specified.
 
 <p class="issue">
     The list above needs updating for the latest ES6 draft.
@@ -10149,26 +10146,6 @@ the <code>typeof</code> operator will return "function" when applied to an inter
         PropertyDescriptor{\[[Value]]: |proto|, \[[Writable]]: <emu-val>false</emu-val>, \[[Enumerable]]: <emu-val>false</emu-val>, \[[Configurable]]: <emu-val>false</emu-val>}).
 </div>
 
-<h5 id="es-interface-hasinstance">\[[HasInstance]]</h5>
-
-<div algorithm="to invoke the internal [[HasInstance]] method of interface objects">
-
-    The internal \[[HasInstance]] method of every [=interface object=] |A|
-    must behave as follows, assuming |V| is the object argument passed to \[[HasInstance]]:
-
-    1.  If Type(|V|) is not Object, return <emu-val>false</emu-val>.
-    1.  Let |O| be [=?=] [=Get=](|A|, "prototype").
-    1.  If Type(|O|) is not Object, [=ECMAScript/throw=] a <emu-val>TypeError</emu-val> exception.
-    1.  If |V| is a [=platform object=] that implements the interface
-        for which |O| is the [=interface prototype object=],
-        return <emu-val>true</emu-val>.
-    1.  Repeat:
-        1.  Set |V| to the value of the \[[Prototype]] internal property of |V|.
-        1.  If |V| is <emu-val>null</emu-val>, return <emu-val>false</emu-val>.
-        1.  If |O| and |V| refer to the same object,
-            return <emu-val>true</emu-val>.
-</div>
-
 
 <h4 id="named-constructors">Named constructors</h4>
 
@@ -10360,16 +10337,6 @@ when applied to a [=legacy callback interface object=].
         PropertyDescriptor{\[[Value]]: 0, \[[Writable]]: <emu-val>false</emu-val>, \[[Enumerable]]: <emu-val>false</emu-val>, \[[Configurable]]: <emu-val>true</emu-val>}).
 </div>
 
-<h5 id="es-legacy-callback-interface-object-hasinstance">\[[HasInstance]]</h5>
-
-<div algorithm="to invoke the internal [[HasInstance]] method of legacy callback interface objects">
-
-    The internal \[[HasInstance]] method of a [=legacy callback interface object=]
-    must behave as follows:
-
-    1.  [=ECMAScript/Throw=] a <emu-val>TypeError</emu-val> exception.
-</div>
-
 
 <h4 id="named-properties-object">Named properties object</h4>