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

LayoutTests/fast/js/toString-overrides-expected.txt

Index: LayoutTests/fast/js/toString-overrides-expected.txt
diff --git a/LayoutTests/fast/js/toString-overrides-expected.txt b/LayoutTests/fast/js/toString-overrides-expected.txt
deleted file mode 100644
index fc121de6406dc546c540be3f90dec9b58844e7bc..0000000000000000000000000000000000000000
--- a/LayoutTests/fast/js/toString-overrides-expected.txt
+++ /dev/null
@@ -1,16 +0,0 @@
-This test checks for regression against 4147: Array.toString() and toLocaleString() improvements from KDE KJS.
-
-On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
-
-
-PASS [1].toString() is '1'
-PASS [1].toLocaleString() is 'toLocaleString'
-FAIL [1].toLocaleString() should be 1. Threw exception TypeError: Property 'toLocaleString' of object [object Number] is not a function
-PASS [/r/].toString() is 'toString2'
-PASS [/r/].toLocaleString() is 'toLocaleString2'
-FAIL [/r/].toLocaleString() should be toString2. Threw exception TypeError: Property 'toLocaleString' of object [object RegExp] is not a function
-PASS caught is true
-PASS successfullyParsed is true
-
-TEST COMPLETE
-