Delete unused files

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Fixes in MED4 loading: supported format variations, improved errors checking.
Keep number of channels in MED4 file

Look ahead to see the number of channels in the first pattern instead of
always setting it to 16.

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Don't release module when it's not loaded

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
[test] Improve module loading tests

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>