pre-upload: remove Legacy-Commit-Queue references

This label is never used by anything anymore.

BUG=chromium:1027747
TEST=none

Change-Id: Ie10785df706e27135259ea74bb32dcd848df31c4
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/repohooks/+/1930935
Tested-by: Sean Abraham <seanabraham@chromium.org>
Auto-Submit: Sean Abraham <seanabraham@chromium.org>
Reviewed-by: Chris McDonald <cjmcdonald@chromium.org>
Commit-Queue: Chris McDonald <cjmcdonald@chromium.org>
diff --git a/pre-upload.py b/pre-upload.py
index 327947c..5f1f95d 100755
--- a/pre-upload.py
+++ b/pre-upload.py
@@ -704,7 +704,6 @@
       'Commit-Ready',
       'Tested-by',
       'Commit-Queue',
-      'Legacy-Commit-Queue',
       'Acked-by',
       'Modified-by',
       'CC',
diff --git a/pre-upload_unittest.py b/pre-upload_unittest.py
index e6a3151..62e5d90 100755
--- a/pre-upload_unittest.py
+++ b/pre-upload_unittest.py
@@ -1311,7 +1311,6 @@
         'Tested-by: partner@hp.corp-partner.google.com\n'
         'Signed-off-by: partner@dell.corp-partner.google.com\n'
         'Commit-Queue: partner@lenovo.corp-partner.google.com\n'
-        'Legacy-Commit-Queue: partner@acer.corp-partner.google.com\n'
         'CC: partner@acer.corp-partner.google.com\n'
         'Acked-by: partner@hewlett-packard.corp-partner.google.com\n')
     self.assertMessageRejected(