Deleting files is simple in Google Drive. Follow these directions.
1. Right click on the document you would like to delete. On a Windows based computer, there will be a right mouse button you can actually click. On a Chromebook, tap the touchpad with two fingers. It should bring up various menu options that look like this:
2. To delete the file, click the remove button at the bottom. This will place it in your trash and will eventually get emptied.