Add Dana to C++ styleguide owners, remove Albert

ajwong is (unfortunately) no longer active on this project.

[email protected],[email protected]

Review URL: https://codereview.chromium.org/1021673004

Cr-Commit-Position: refs/heads/master@{#323044}
diff --git a/styleguide/c++/OWNERS b/styleguide/c++/OWNERS
index 2157101..bb9ed6c 100644
--- a/styleguide/c++/OWNERS
+++ b/styleguide/c++/OWNERS
@@ -1,3 +1,3 @@
[email protected]
[email protected]
 [email protected]
 [email protected]