Remove invalid suggestion from roll_deps.py error message.

BUG=libyuv:710
NOTRY=True

Change-Id: I47c80980a6ed8bcfc247e75f3936f028576a6c5a
Reviewed-on: https://chromium-review.googlesource.com/584846Reviewed-by: Frank Barchard <fbarchard@google.com>
Commit-Queue: Henrik Kjellander <kjellander@chromium.org>

tools_libyuv/autoroller/roll_deps.py

@@ -333,10 +333,8 @@ def UpdateDepsFile(deps_filename, old_cr_revision, new_cr_revision,
     local_dep_dir = os.path.join(CHECKOUT_ROOT_DIR, dep.path)
     if not os.path.isdir(local_dep_dir):
       raise RollError(
-          'Cannot find local directory %s. Either run\n'
-          'gclient sync --deps=all\n'
-          'or make sure the .gclient file for your solution contains all '
-          'platforms in the target_os list, i.e.\n'
+          'Cannot find local directory %s. Make sure the .gclient file\n'
+          'contains all platforms in the target_os list, i.e.\n'
           'target_os = ["android", "unix", "mac", "ios", "win"];\n'
           'Then run "gclient sync" again.' % local_dep_dir)
     _, stderr = _RunCommand(