Remove duplicate tests (#2377)

* Remove duplicate test

The behavior under test is verified by another file in Test262:

test/language/expressions/compound-assignment/S11.13.2_A2.1_T3.3.js

That version is preferable because it does not depend on `eval` and
because it supports both strict and non-strict mode.

* Remove overly-permissive test

By asserting only the presence of an "own" property, this test can be
satisfied from both strict mode code and non-strict mode code.

The following test verifies the presence of the "own" property and the
associated descriptor's values in strict mode:

test/language/arguments-object/10.6-13-c-3-s.js

That subsumes the semantics verified by this test, making it
superfluous. Remove the test.

* Remove overly-permissive test

By asserting only the absence of a syntax error, this test can be
satisfied from both strict mode code and non-strict mode code.

The following test verifies the runtime behavior of accessing the
property in strict mode code:

test/language/arguments-object/10.6-13-c-1-s.js

That subsumes the semantics verified by this test, making it
superfluous. Remove the test.

* Remove duplicate test

The behavior under test is verified by another file in Test262:

test/built-ins/Math/prop-desc.js

That version is preferable because it follows the test suite's
convention for testing property descriptors and because it supports both
strict and non-strict mode.

* Remove duplicate test

The behavior under test is verified by two separate files:

test/language/statements/function/line-terminator-non-strict.js
test/language/statements/function/line-terminator-strict.js

These files differ only in their usage of the `noStrict`/`onlyStrict`
metadata. Because tests are intended to be interpreted in both modes by
default, these can be expressed with a single file that does not limit
the permissible modes.

test/built-ins/global/S10.2.3_A2.2_T4.js

@@ -1,20 +0,0 @@
-// Copyright 2009 the Sputnik authors.  All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-info: Global object properties have attributes { DontEnum }
-es5id: 10.2.3_A2.2_T4
-description: Function execution context - Other Properties
-flags: [noStrict]
----*/
-
-function test() {
-  //CHECK#1
-  for (var x in this) {
-    if (x === 'Math') {
-      $ERROR("#1: 'Math' have attribute DontEnum");
-    }
-  }
-}
-
-test();

test/language/arguments-object/10.6-14-1-s.js

@@ -1,14 +0,0 @@
-// Copyright (c) 2012 Ecma International.  All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-es5id: 10.6-14-1-s
-description: Strict Mode - 'callee' exists under strict mode
-flags: [onlyStrict]
----*/
-
-        var argObj = function () {
-            return arguments;
-        } ();
-
-assert(argObj.hasOwnProperty("callee"), 'argObj.hasOwnProperty("callee") !== true');

test/language/arguments-object/10.6-1gs.js

@@ -1,14 +0,0 @@
-// Copyright (c) 2012 Ecma International.  All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-es5id: 10.6-1gs
-description: >
-    Strict Mode - arguments.callee cannot be accessed in a strict
-    function, but does not throw an early error
-flags: [onlyStrict]
----*/
-
-function f_10_6_1_gs(){
-    return arguments.callee;
-}

test/language/expressions/compound-assignment/11.13.2-3-s.js

@@ -1,16 +0,0 @@
-// Copyright (c) 2012 Ecma International.  All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-es5id: 11.13.2-3-s
-description: >
-    Strict Mode - ReferenceError is thrown if the
-    LeftHandSideExpression of a Compound Assignment operator(%=)
-    evaluates to an unresolvable reference
-flags: [onlyStrict]
----*/
-
-
-assert.throws(ReferenceError, function() {
-            eval("_11_13_2_3 %= 1;");
-});

test/language/expressions/compound-assignment/11.13.2-7-s.js

@@ -1,16 +0,0 @@
-// Copyright (c) 2012 Ecma International.  All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-es5id: 11.13.2-7-s
-description: >
-    Strict Mode - ReferenceError is thrown if the
-    LeftHandSideExpression of a Compound Assignment operator(>>=)
-    evaluates to an unresolvable reference
-flags: [onlyStrict]
----*/
-
-
-assert.throws(ReferenceError, function() {
-            eval("_11_13_2_7 >>= 1;");
-});

test/language/statements/function/line-terminator-non-strict.js

@@ -1,49 +0,0 @@
-// Copyright 2009 the Sputnik authors.  All rights reserved.
-// This code is governed by the BSD license found in the LICENSE file.
-
-/*---
-info: Any separators are admitted between declaration chunks
-es5id: 13_A16
-description: Inserting separators between declaration chunks
-flags: [noStrict]
----*/
-
-function
-x
-(
-)
-{
-}
-;
-
-x();
-
-function                                                    y                                   (                                          )                                              {};
-
-y();
-
-function
-
-z
-
-(
-
-)
-
-{
-    
-}
-
-;
-
-z();
-
-// The following function expression is expressed with literal unicode
-// characters so that parsers may benefit from this test. The included code
-// points are as follows:
-//
-// "function\u0009\u2029w(\u000C)\u00A0{\u000D}"
-
-function	
w() {
}
-
-w();