Merge pull request #328 from bullet-train-co/fixes/unneeded-docs

Remove unneeded lines from docs

bullet_train/docs/field-partials/file-field.md

@@ -8,8 +8,7 @@ In addition, Bullet Train has integrated the direct-uploads feature of Active St
 
 ## Example
 
-Add a 'document' file as an attachment to a `Post` model:
-
+The following steps illustrate how to add a `document` file attachment to a `Post` model.
 Add the following to `app/models/post.rb`:
 
 ```ruby