Remove old tests that have been migrated to the v8 repo.

LayoutTests/fast/js/script-tests/native-error-prototype.js

Index: LayoutTests/fast/js/script-tests/native-error-prototype.js
diff --git a/LayoutTests/fast/js/script-tests/native-error-prototype.js b/LayoutTests/fast/js/script-tests/native-error-prototype.js
deleted file mode 100644
index 4da02ec580e85ac709e010fc981df8d872be18b6..0000000000000000000000000000000000000000
--- a/LayoutTests/fast/js/script-tests/native-error-prototype.js
+++ /dev/null
@@ -1,16 +0,0 @@
-description(
-'This is a test case for bugs <a href="https://bugs.webkit.org/show_bug.cgi?id=55346">55346</a>, <a href="https://bugs.webkit.org/show_bug.cgi?id=70889">70889</a>, and <a href="https://bugs.webkit.org/show_bug.cgi?id=75452">75452</a>.'
-);
-
-shouldBe("({}).toString.call(Error.prototype)", '"[object Error]"');
-shouldBe("({}).toString.call(RangeError.prototype)", '"[object Error]"');
-
-var err = new Error("message");
-err.name = "";
-shouldBe("err.toString()", '"message"');
-
-var err = new Error();
-shouldBeFalse("err.hasOwnProperty('message')");
-
-var err = new Error(undefined);
-shouldBeFalse("err.hasOwnProperty('message')");