Remove duplicate entry in PREUPLOAD.cfg

Test: Upload
Change-Id: I64dc19e7d266417c4e7d054466b78972e5bdf933
diff --git a/PREUPLOAD.cfg b/PREUPLOAD.cfg
index 3b2a9e7..f054596 100644
--- a/PREUPLOAD.cfg
+++ b/PREUPLOAD.cfg
@@ -1,7 +1,6 @@
 [Builtin Hooks]
 bpfmt = true
 clang_format = true
-bpfmt = true
 
 [Builtin Hooks Options]
 # Only turn on clang-format check for the following subfolders.