Update documentation (#1116)

## Description of Changes
Modified documentation and removed an unused variable.

Taken from: #1115

## Tests and Linting
- [x] This branch is up-to-date with the `develop` branch.
- [x] `pytest` passes on my local development environment.
- [x] `pre-commit` passes on my local development environment.

.github/pull_request_template.md

@@ -25,6 +25,6 @@ dispatcher where…", "Improve our handling of…", etc.
 
 
 ## Tests and Linting
- - [ ] This branch is up-to-date with the `develop` branch.
- - [ ] `pytest` passes on my local development environment.
- - [ ] `pre-commit` passes on my local development environment.
+- [ ] This branch is up-to-date with the `develop` branch.
+- [ ] `pytest` passes on my local development environment.
+- [ ] `pre-commit` passes on my local development environment.

CONTRIB.md

@@ -151,15 +151,14 @@ From here on out, we'll be using the Flask CLI. First we need to 'stamp' the cur
 ```shell
 $ docker exec -it openoversight-web-1 bash # 'openoversight-web-1' is the name of the app container seen in the step above
 $ flask db stamp head
-$ flask db migrate -m "[THE NAME OF YOUR MIGRATION IN ALL LOWER CASE]" # NOTE: Slugs are limited to 40 characters and will be truncated after the limit
 ```
 
 (Hint: If you get errors when running `flask` commands, e.g. because of differing Python versions, you may need to run the commands in the docker container by prefacing them as so: `docker exec -it openoversight_web_1 flask db stamp head`)
 
 Next make your changes to the database models in `OpenOversight/app/models/database.py`. You'll then generate the migrations:
 
 ```shell
-$ flask db migrate -m "[THE NAME OF YOUR MIGRATION IN ALL LOWER CASE]"
+$ flask db migrate -m "[THE NAME OF YOUR MIGRATION IN ALL LOWER CASE]" # NOTE: Slugs are limited to 40 characters and will be truncated after the limit
 ```
 
 And then you should inspect/edit the migrations. You can then apply the migrations:

OpenOversight/app/commands.py

@@ -501,7 +501,6 @@ def bulk_add_officers(filename, no_create, update_by_name, update_static_fields)
 
         for row in csvfile:
             department_id = row["department_id"]
-            department = departments.get(department_id)
             if row["department_id"] not in departments:
                 department = Department.query.filter_by(id=department_id).one_or_none()
                 if department: