Remove virtual/softwarecompositing suite

LayoutTests/platform/linux/virtual/softwarecompositing/backing/no-backing-for-clip-expected.txt

Index: LayoutTests/platform/linux/virtual/softwarecompositing/backing/no-backing-for-clip-expected.txt
diff --git a/LayoutTests/platform/linux/virtual/softwarecompositing/backing/no-backing-for-clip-expected.txt b/LayoutTests/platform/linux/virtual/softwarecompositing/backing/no-backing-for-clip-expected.txt
deleted file mode 100644
index 71522228b0b308ee31ecc73a365a0881c3aa35d7..0000000000000000000000000000000000000000
--- a/LayoutTests/platform/linux/virtual/softwarecompositing/backing/no-backing-for-clip-expected.txt
+++ /dev/null
@@ -1,46 +0,0 @@
-This layer should not have backing store.
-This layer should not have backing store.
-{
-  "bounds": [800, 600],
-  "children": [
-    {
-      "bounds": [800, 600],
-      "contentsOpaque": true,
-      "drawsContent": true,
-      "children": [
-        {
-          "position": [8, 8],
-          "bounds": [342, 244],
-          "children": [
-            {
-              "position": [1, 1],
-              "bounds": [340, 242],
-              "children": [
-                {
-                  "position": [20, 40],
-                  "bounds": [342, 182],
-                  "children": [
-                    {
-                      "position": [1, 1],
-                      "bounds": [340, 180],
-                      "children": [
-                        {
-                          "position": [30, 50],
-                          "bounds": [100, 100],
-                          "contentsOpaque": true,
-                          "drawsContent": true,
-                          "backgroundColor": "#C0C0C0"
-                        }
-                      ]
-                    }
-                  ]
-                }
-              ]
-            }
-          ]
-        }
-      ]
-    }
-  ]
-}
-