Move Linux-specific LayoutTests to generic location

LayoutTests/platform/chromium-linux/fast/text/international/arabic-vertical-offset.html

Index: LayoutTests/platform/chromium-linux/fast/text/international/arabic-vertical-offset.html
diff --git a/LayoutTests/platform/chromium-linux/fast/text/international/arabic-vertical-offset.html b/LayoutTests/platform/chromium-linux/fast/text/international/arabic-vertical-offset.html
deleted file mode 100644
index a83449636bb8af2a9d897a6274d8f420fee400ac..0000000000000000000000000000000000000000
--- a/LayoutTests/platform/chromium-linux/fast/text/international/arabic-vertical-offset.html
+++ /dev/null
@@ -1,23 +0,0 @@
-<style>
-  /*  This font contains a line glyph(U+0606) and a square glyph(U+06E1), and
-   *  has a 'mark' feature that locates the square glyph above the line glyph.
-   *  This font was created by using FontForge from scratch.
-   */
-  @font-face {
-    font-family: test;
-    src: url(resources/font-for-arabic-offset-test.ttf);
-  }
-  div {
-    font-family: test;
-    font-size: 48pt;
-  }
-</style>
-<p>The square glyph should be located above the line glyph.</p>
-<!-- Use arabic code points to make WebKit use ComplexTextController -->
-<div>&#x0606;&#x06e1;</div>
-<script>
-if (window.testRunner) {
-    testRunner.waitUntilDone();
-    setTimeout(function() { testRunner.notifyDone(); }, 100);
-}
-</script>