Very simple & super lightweight addon that permanetly hides blizzards default party frames. I use oUF and my own personal oUF layout and prefer grid like style even for party frames hence the reason party frames were removed in this addon.
This addon also hides the raid manager bar located on upper left corner of your screen.
*Note* You sill have to hide the raid frames by making sure that "Use Raid-Style Party Frames" is unchecked in Interface->Unit Frames.