Closes netbox-community#6753: Add plugin removal instructions to the …

…docs

docs/plugins/index.md

@@ -89,3 +89,58 @@ Restart the WSGI service to load the new plugin:
 ```no-highlight
 # sudo systemctl restart netbox
 ```
+
+## Removing Plugins
+
+Follow these steps to completely remove a plugin.
+
+### Update Configuration
+
+Remove the plugin from the `PLUGINS` list in `configuration.py`. Also remove any relevant configuration parameters from `PLUGINS_CONFIG`.
+
+### Remove the Python Package
+
+Use `pip` to remove the installed plugin:
+
+```no-highlight
+$ source /opt/netbox/venv/bin/activate
+(venv) $ pip uninstall <package>
+```
+
+### Restart WSGI Service
+
+Restart the WSGI service:
+
+```no-highlight
+# sudo systemctl restart netbox
+```
+
+### Drop Database Tables
+
+!!! note
+    This step is necessary only for plugin which have created one or more database tables (generally through the introduction of new models). Check your plugin's documentation if unsure.
+
+Enter the PostgreSQL database shell to determine if the plugin has created any SQL tables. Substitute `pluginname` in the example below for the name of the plugin being removed. (You can also run the `\dt` command without a pattern to list _all_ tables.)
+
+```no-highlight
+netbox=> \dt pluginname_*
+                   List of relations
+                   List of relations
+ Schema |       Name     | Type  | Owner
+--------+----------------+-------+--------
+ public | pluginname_foo | table | netbox
+ public | pluginname_bar | table | netbox
+(2 rows)
+```
+
+!!! warning
+    Exercise extreme caution when removing tables. Users are strongly encouraged to perform a backup of their database immediately before taking these actions.
+
+Drop each of the listed tables to remove it from the database:
+
+```no-highlight
+netbox=> DROP TABLE pluginname_foo;
+DROP TABLE
+netbox=> DROP TABLE pluginname_bar;
+DROP TABLE
+```