Remove the currently broken clang_format hook

Change-Id: Ibc6dd563d337e0b70d697049931239b68bb33392

preupload-hooks/GLOBAL-PREUPLOAD.cfg

diff --git a/preupload-hooks/GLOBAL-PREUPLOAD.cfg b/preupload-hooks/GLOBAL-PREUPLOAD.cfg
index b87fdec..ab19809 100644
--- a/preupload-hooks/GLOBAL-PREUPLOAD.cfg
+++ b/preupload-hooks/GLOBAL-PREUPLOAD.cfg
@@ -7,7 +7,3 @@
 [Builtin Hooks]
 pylint3 = true
 cpplint = true
-clang_format = true
-
-[Builtin Hooks Options]
-clang_format = --commit ${PREUPLOAD_COMMIT} --style file --extensions c,h,cc,cpp