[fiddle] Remove duplicate skia checkout from fiddler's release

This caused the build to slow down.

Bug: skia:12816
Change-Id: Ic954977a000de38a6877bfb36f7dd42dae4e370e
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/494217
Reviewed-by: Leandro Lovisolo <lovisolo@google.com>
Commit-Queue: Ravi Mistry <rmistry@google.com>
diff --git a/fiddlek/BUILD.bazel b/fiddlek/BUILD.bazel
index b8df68e..01a0858 100644
--- a/fiddlek/BUILD.bazel
+++ b/fiddlek/BUILD.bazel
@@ -103,9 +103,12 @@
     run_commands_skia = [
         # Builds will use libs from SwiftShader.
         "git clone https://swiftshader.googlesource.com/SwiftShader /tmp/swiftshader",
-        # Move the skia checkout into the dir used by the fiddler k8s config.
+        # Copy the skia checkout into the dir used by the fiddler k8s config.
+        # We cannot do a move because we get a "Permission denied".
         "mkdir /tmp/skia",
         "cp -r /usr/local/share/fiddler/skia /tmp/skia/",
+        # Cleanup the old skia checkout location in /usr/local/share/fiddler/skia
+        "rm -rf /usr/local/share/fiddler/skia/*",
         # Build again so that first runs are fast in the new container.
         "/tmp/depot_tools/ninja -C /tmp/skia/skia/out/Static",
     ],