Travis: "centos" platform is no longer part of default list

check 
https://github.com/sensu/sensu-go-bonsai-asset/blob/85b1bc1598b4e330f7f75f4dd11e3e0445634d84/ruby-runtime/travis-build-ruby-plugin-assets.sh#L12

Author: VeselaHouba

.bonsai.yml

@@ -18,14 +18,6 @@ builds:
   -  "entity.system.os == 'linux'"
   -  "entity.system.arch == 'amd64'"
   -  "entity.system.platform == 'alpine'"
-- platform: "centos"
-  arch: "amd64"
-  asset_filename: "#{repo}_#{version}_centos_linux_amd64.tar.gz"
-  sha_filename: "#{repo}_#{version}_sha512-checksums.txt"
-  filter:
-  -  "entity.system.os == 'linux'"
-  -  "entity.system.arch == 'amd64'"
-  -  "entity.system.platform_family == 'rhel'"
 - platform: "centos6"
   arch: "amd64"
   asset_filename: "#{repo}_#{version}_centos6_linux_amd64.tar.gz"

CHANGELOG.md

@@ -7,6 +7,8 @@ This CHANGELOG follows the format listed at [Keep A Changelog](http://keepachang
 - Added 'check-ctime.rb' for checking the file created time (@landondao1)
 
 ## [Unreleased]
+### Removed
+- Removed Bonsai reference for generic "centos" assets.
 
 ## [2.1.0] - 2020-07-16
 ### Added