tests: clean up repo_trace._TRACE_FILE patching

Patch this automatically for all tests rather than duplicating the
boilerplate in diff testcases.

Change-Id: I391d5c859974cda3d5680d34ede2ce6e9e925838
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/354358
Reviewed-by: Joanna Wang <jojwang@google.com>
Tested-by: Mike Frysinger <vapier@google.com>

1 files changed, 0 insertions, 1 deletions

diff --git a/run_tests b/run_tests
index 7c9ff41d..573dd446 100755
--- a/run_tests
+++ b/run_tests
@@ -20,7 +20,6 @@ import os
 import shutil
 import subprocess
 import sys
-import repo_trace
 
 
 def find_pytest():