Drop --clone from commands in skia repo.

--clone, and SkPicture::clone(), are no longer.

CQ_EXTRA_TRYBOTS=tryserver.skia:Housekeeper-PerCommit-Trybot

BUG=skia:
R=rmistry@google.com

Review URL: https://codereview.chromium.org/343813006

gm/rebaseline_server/compare_rendered_pictures_test.py

diff --git a/gm/rebaseline_server/compare_rendered_pictures_test.py b/gm/rebaseline_server/compare_rendered_pictures_test.py
index e6d2574..7656d11 100755
--- a/gm/rebaseline_server/compare_rendered_pictures_test.py
+++ b/gm/rebaseline_server/compare_rendered_pictures_test.py
@@ -78,7 +78,6 @@
     binary = self.find_path_to_program('render_pictures')
     return subprocess.check_output([
         binary,
-        '--clone', '1',
         '--config', '8888',
         '-r', out_path,
         '--writeChecksumBasedFilenames',

tools/tests/render_pictures_test.py

diff --git a/tools/tests/render_pictures_test.py b/tools/tests/render_pictures_test.py
index 59722e8..8feef67 100755
--- a/tools/tests/render_pictures_test.py
+++ b/tools/tests/render_pictures_test.py
@@ -555,7 +555,6 @@
   def _run_render_pictures(self, args):
     binary = self.find_path_to_program('render_pictures')
     return self.run_command([binary,
-                             '--clone', '1',
                              '--config', '8888',
                              ] + args)