planet (en) - remove chetblog feed (404)

en-planet.log:ERROR:planet.runner:
Error 404 while updating feed
http://chetblong.blogspot.com/feeds/posts/default

"Blog has been removed"

Change-Id: I2cd12b263c6e292f3a819190c4c7637b24b159cc
Merge "planet (en) - remove chetblog feed (404)" into production