Remove unused harness file

The harness file `Test262Error.js` has not contained executable code since it
was introduced in this project [1]. The definition of the `Test262Error`
function has consistently been located in the `sta.js` harness file which test
runners are expected to inject into the test environment.

Remove the file and all references to it.

[1] See commit c33bf0e0

harness/Test262Error.js

-//function Test262Error(message) {
-//    if (message) this.message = message;
-//}
-//
-//Test262Error.prototype.toString = function () {
-//    return "Test262 Error: " + this.message;
-//};

test/built-ins/Error/prototype/S15.11.4_A3.js

@@ -5,8 +5,6 @@
 info: Since Error prototype object is not function it has no [[Call]] method
 es5id: 15.11.4_A3
 description: Checking if call of Error prototype as a function fails
-includes:
-    - Test262Error.js
 ---*/
 
 //////////////////////////////////////////////////////////////////////////////

test/built-ins/Error/prototype/S15.11.4_A4.js

@@ -5,8 +5,6 @@
 info: Since Error prototype object is not function it has no [[Construct]] method
 es5id: 15.11.4_A4
 description: Checking if creating "new Error.prototype" fails
-includes:
-    - Test262Error.js
 ---*/
 
 //////////////////////////////////////////////////////////////////////////////

test/built-ins/Proxy/apply/return-abrupt.js

@@ -4,7 +4,6 @@
 es6id: 9.5.13
 description: >
     Return is an abrupt completion
-includes: [Test262Error.js]
 ---*/
 
 var target = function(a, b) { return a + b; };

test/built-ins/Proxy/construct/return-is-abrupt.js

@@ -9,7 +9,6 @@ info: >
 
     9. Let newObj be Call(trap, handler, «target, argArray, newTarget »).
     10. ReturnIfAbrupt(newObj).
-includes: [Test262Error.js]
 ---*/
 
 function Target() {}

test/built-ins/Proxy/defineProperty/return-is-abrupt.js

@@ -12,7 +12,6 @@ info: >
     descObj»)).
     11. ReturnIfAbrupt(booleanTrapResult).
     ...
-includes: [Test262Error.js]
 ---*/
 
 var p = new Proxy({}, {

test/built-ins/Proxy/deleteProperty/return-is-abrupt.js

@@ -7,7 +7,6 @@ description: >
 info: >
     9. Let booleanTrapResult be ToBoolean(Call(trap, handler, «target, P»)).
     10. ReturnIfAbrupt(booleanTrapResult).
-includes: [Test262Error.js]
 ---*/
 
 var p = new Proxy({}, {

test/built-ins/Proxy/enumerate/return-is-abrupt.js

@@ -9,7 +9,6 @@ info: >
 
     8. Let trapResult be Call(trap, handler, «target»).
     9. ReturnIfAbrupt(trapResult).
-includes: [Test262Error.js]
 ---*/
 
 var x;

test/built-ins/Proxy/get/return-is-abrupt.js

@@ -9,7 +9,6 @@ info: >
 
     9. Let trapResult be Call(trap, handler, «target, P, Receiver»).
     10. ReturnIfAbrupt(trapResult).
-includes: [Test262Error.js]
 ---*/
 
 var p = new Proxy({}, {

test/built-ins/Proxy/getOwnPropertyDescriptor/return-is-abrupt.js

@@ -11,7 +11,6 @@ info: >
     9. Let trapResultObj be Call(trap, handler, «target, P»).
     10. ReturnIfAbrupt(trapResultObj).
     ...
-includes: [Test262Error.js]
 ---*/
 
 var p = new Proxy({}, {

test/built-ins/Proxy/getPrototypeOf/return-is-abrupt.js

@@ -7,7 +7,6 @@ description: >
 info: >
     8. Let handlerProto be Call(trap, handler, «target»).
     9. ReturnIfAbrupt(handlerProto).
-includes: [Test262Error.js]
 ---*/
 
 var p = new Proxy({}, {

test/built-ins/Proxy/has/return-is-abrupt-in.js

@@ -11,7 +11,6 @@ info: >
     9. Let booleanTrapResult be ToBoolean(Call(trap, handler, «target, P»)).
     10. ReturnIfAbrupt(booleanTrapResult).
     ...
-includes: [Test262Error.js]
 ---*/
 
 var p = new Proxy({}, {

test/built-ins/Proxy/has/return-is-abrupt-with.js

@@ -12,7 +12,6 @@ info: >
     10. ReturnIfAbrupt(booleanTrapResult).
     ...
 flags: [noStrict]
-includes: [Test262Error.js]
 ---*/
 
 var p = new Proxy({}, {

test/built-ins/Proxy/isExtensible/return-is-abrupt.js

@@ -11,7 +11,6 @@ info: >
     8. Let booleanTrapResult be ToBoolean(Call(trap, handler, «target»)).
     9. ReturnIfAbrupt(booleanTrapResult).
     ...
-includes: [Test262Error.js]
 ---*/
 
 var p = new Proxy({}, {

test/built-ins/Proxy/ownKeys/return-is-abrupt.js

@@ -14,7 +14,6 @@ info: >
 
         1. ReturnIfAbrupt(obj).
     ...
-includes: [Test262Error.js]
 ---*/
 
 var p = new Proxy({}, {

test/built-ins/Proxy/preventExtensions/return-is-abrupt.js

@@ -11,7 +11,6 @@ info: >
     8. Let booleanTrapResult be ToBoolean(Call(trap, handler, «target»)).
     9. ReturnIfAbrupt(booleanTrapResult).
     ...
-includes: [Test262Error.js]
 ---*/
 
 var p = new Proxy({}, {

test/built-ins/Proxy/set/return-is-abrupt.js

@@ -11,7 +11,6 @@ info: >
     9. Let booleanTrapResult be ToBoolean(Call(trap, handler, «target, P, V, Receiver»)).
     10. ReturnIfAbrupt(booleanTrapResult).
     ...
-includes: [Test262Error.js]
 ---*/
 
 var p = new Proxy({}, {

test/built-ins/Proxy/setPrototypeOf/return-is-abrupt.js

@@ -9,7 +9,6 @@ info: >
 
     9. Let booleanTrapResult be ToBoolean(Call(trap, handler, «target, V»)).
     10. ReturnIfAbrupt(booleanTrapResult).
-includes: [Test262Error.js]
 ---*/
 
 var p = new Proxy({}, {

test/built-ins/String/fromCharCode/S15.5.3.2_A4.js

@@ -5,8 +5,6 @@
 info: String.fromCharCode has not [[construct]] method
 es5id: 15.5.3.2_A4
 description: Checking if creating "new String.fromCharCode" fails
-includes:
-    - Test262Error.js
 ---*/
 
 var __fcc__func = String.fromCharCode;

test/built-ins/String/prototype/charCodeAt/S15.5.4.5_A7.js

@@ -5,8 +5,6 @@
 info: String.prototype.charCodeAt can't be used as constructor
 es5id: 15.5.4.5_A7
 description: Checking if creating the String.prototype.charCodeAt object fails
-includes:
-    - Test262Error.js
 ---*/
 
 var __FACTORY = String.prototype.charCodeAt;