Which modules to import?

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Diordna

I see a whole bunch and I have no clue what they do. I want to cut down on the file size but I don't know what to cut out.

Here's my approximate list of what I use:
-Drawing circles/lines/boxes (basic OpenGL)
-Pixmaps
-Keyboard
-Mouse
-File I/O
-Bit shifting
-Ogg and Wav sounds
-BASIC commands occasionally
-PNG's
-Randomizer
-Trig
-Font loading/drawing

Which modules should I import?