Move Linux-specific LayoutTests to generic location

LayoutTests/platform/chromium-linux/fast/text/chromium-linux-text-subpixel-positioning-expected.txt

Index: LayoutTests/platform/chromium-linux/fast/text/chromium-linux-text-subpixel-positioning-expected.txt
diff --git a/LayoutTests/platform/chromium-linux/fast/text/chromium-linux-text-subpixel-positioning-expected.txt b/LayoutTests/platform/chromium-linux/fast/text/chromium-linux-text-subpixel-positioning-expected.txt
deleted file mode 100644
index db683ebbb6cb20597c22581eda3df98cb3aa3fa3..0000000000000000000000000000000000000000
--- a/LayoutTests/platform/chromium-linux/fast/text/chromium-linux-text-subpixel-positioning-expected.txt
+++ /dev/null
@@ -1,17 +0,0 @@
-layer at (0,0) size 800x600
-  RenderView at (0,0) size 800x600
-layer at (0,0) size 800x600
-  RenderBlock {HTML} at (0,0) size 800x600
-    RenderBody {BODY} at (8,8) size 784x576
-      RenderBlock {P} at (0,0) size 784x20
-        RenderText {#text} at (0,0) size 617x19
-          text run at (0,0) width 463: "This test requires a Linux build of DumpRenderTree, as it needs to turn "
-          text run at (462,0) width 155: "on subpixel positioning."
-      RenderBlock {P} at (0,36) size 784x40
-        RenderText {#text} at (0,0) size 752x39
-          text run at (0,0) width 364: "This text should be rendered using subpixel positioning. "
-          text run at (363,0) width 97: "Glyphs should "
-          text run at (459,0) width 293: "be placed at non-integral positions, and in the"
-          text run at (0,20) width 183: "following string of repeated "
-          text run at (182,20) width 335: "\"l\" characters, the glyphs should not all be rendered "
-          text run at (516,20) width 175: "identically: llllllllllllllllllllll"