update_engine: Run clang-format on common/

BUG=none
TEST=unittest

Change-Id: Icdaf5017e03a197bc576f08f4b8dcdd00cff217c
Reviewed-on: https://chromium-review.googlesource.com/1407541
Commit-Ready: Amin Hassani <[email protected]>
Tested-by: Amin Hassani <[email protected]>
Reviewed-by: Sen Jiang <[email protected]>
diff --git a/common/file_fetcher.h b/common/file_fetcher.h
index 2368b1d..fbdfc32 100644
--- a/common/file_fetcher.h
+++ b/common/file_fetcher.h
@@ -57,7 +57,7 @@
 
   // Ignore all extra headers for files.
   void SetHeader(const std::string& header_name,
-                 const std::string& header_value) override {};
+                 const std::string& header_value) override {}
 
   // Suspend the asynchronous file read.
   void Pause() override;