Remove check for clean branch from safetynet_job.py.

Branches can be dirty when a library sync'ed with gclient sync is
removed from DEPS and from .gitignore. The library will be removed
by "gclient sync --force".

Change-Id: I19fa4a3f13989edb41cd671fd412cc67e67819eb
Reviewed-on: https://pdfium-review.googlesource.com/42211
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
diff --git a/testing/tools/safetynet_job.py b/testing/tools/safetynet_job.py
index 7416533..f0e4efa 100755
--- a/testing/tools/safetynet_job.py
+++ b/testing/tools/safetynet_job.py
@@ -67,10 +67,6 @@
         os.path.pardir)
     os.chdir(pdfium_src_dir)
 
-    if not self.git.IsCurrentBranchClean() and not self.args.no_checkout:
-      PrintWithTime('Current branch is not clean, aborting')
-      return 1
-
     branch_to_restore = self.git.GetCurrentBranchName()
 
     if not self.args.no_checkout: