Remove all the things for feedback

Again, I'm not actually suggesting that you merge this in and remove all your code. This just makes it easier to leave feedback :smile: 

### Don't merge this pull request
The same type of thing could be done for this method to make it more clear about what it's doing.

```ruby
def find_recipe(id)
  query = 'SELECT recipes.id, recipes.name AS name,
          recipes.description, recipes.instructions,
          ingredients.name AS ingredients
          FROM recipes LEFT OUTER JOIN ingredients
          ON recipes.id = ingredients.recipe_id
          WHERE recipes.id = $1'

  db_connection do |conn|
    conn.exec(query, [id])
  end
end

get '/recipes/:id' do
  @recipe = find_recipe(params[:id])

  erb :single_recipe
end
```