misc(codeowners): represent brendan's leave (#3991)

.github/CODEOWNERS

@@ -3,17 +3,17 @@
 # https://help.github.com/articles/about-codeowners/
 
 lighthouse-cli/                     @patrickhulce       @paulirish
-lighthouse-cli/test/fixtures/       @patrickhulce       @brendankenny
-lighthouse-cli/test/smokehouse/     @patrickhulce       @brendankenny
+lighthouse-cli/test/fixtures/       @patrickhulce       # @brendankenny
+lighthouse-cli/test/smokehouse/     @patrickhulce       # @brendankenny
 
 lighthouse-core/gather/             @patrickhulce       @paulirish
-lighthouse-core/audits/             @patrickhulce       @brendankenny   @paulirish
+lighthouse-core/audits/             @patrickhulce       @paulirish # @brendankenny
 lighthouse-core/report/             @vinamratasingal    @paulirish
 
-lighthouse-core/config/             @patrickhulce       @brendankenny
-lighthouse-core/lib/                @brendankenny       @paulirish
+lighthouse-core/config/             @patrickhulce       # @brendankenny
+lighthouse-core/lib/                @paulirish          # @brendankenny
 lighthouse-extension/               @paulirish          @patrickhulce
-lighthouse-viewer/                  @ebidel             @brendankenny
+lighthouse-viewer/                  @ebidel             # @brendankenny
 
 docs/                               @vinamratasingal    @paulirish