README.md in vault-tools-1.0.1 vs README.md in vault-tools-2.0.0

- old
+ new

@@ -24,14 +24,11 @@
 - overwrite `Time.to_s` to default to ISO8601
 - replace Ruby's default, deprecated `Config` with `Vault::Config`
 - if the `CONFIG_APP` environment variable is defined and this is
   the production environment, it will attempt to use the Heroku API
   to load the config vars from another app into `Vault::Config`
-- enable distributed tracing via Zipkin, if the [required config
-  vars](#configs-for-tracing) are set
 
-
 ### `Vault::Config`
 
 Provides a better way to configure the application than simply pulling
 strings from `ENV`.
 
@@ -90,19 +87,9 @@
     vendor/bin/t
 
 Generate the API documentation:
 
     vendor/bin/d
-
-## Configs for tracing
-
-The following are config vars to be set in the consumer app for tracing with
-Zipkin:
-* `APP_NAME` (required) what the trace will show up as in the Zipkin interface.
-* `ZIPKIN_ENABLED` (required) must be set to `true` to start tracing.
-* `ZIPKIN_API_HOST` (required) where to post traces to. URL must contain the
-  basic auth creds from the Tools team.
-* `ZIPKIN_SAMPLE_RATE` defaults to `0.1`.
 
 ## Releasing
 
     > bundle exec rake release