Removed section referencing environment variables

Configuration.md

@@ -5,30 +5,4 @@ used for modifying filters and setting variables such as custom field names.
 
 ```sh
 cp config.py.example config.py
-```
-
-# Set environment variables
-
-Set the following environment variables:
-
-```sh
-export ZABBIX_HOST="https://zabbix.local"
-export ZABBIX_USER="username"
-export ZABBIX_PASS="Password"
-export NETBOX_HOST="https://netbox.local"
-export NETBOX_TOKEN="secrettoken"
-```
-
-Or, you can use a Zabbix API token to login instead of using a username and
-password. In that case `ZABBIX_USER` and `ZABBIX_PASS` will be ignored.
-
-```sh
-export ZABBIX_TOKEN=othersecrettoken
-```
-
-If you are using custom SSL certificates for NetBox and/or Zabbix, you can set
-the following environment variable to the path of your CA bundle file:
-
-```sh
-export REQUESTS_CA_BUNDLE=/path/to/your/ca-bundle.crt
 ```