Settings improvements / Remove parts that have no effect

[T-MaxWiese-T]

Test:
-CacheSizeMegs=256 -> More RAM available. This in addition speeds up loading times. I once set the value to 2 and could not find any difference. There were 2 players who had problems with FPS and increasing it to 500 helped them so maybe you should consider increasing the value. But for me it has no effect on FPS or anything else.

-UseEAX=True -> EAX will add effects such as pitch, some cheap echo and enhance volume control. **Seems to depend on the 3D sound.
Changes:

Channels=64 -> Channels values are to determine amount of sound clips loaded and played at same time. **This change may also be unnecessary

-ConfiguredInternetSpeed=20000 -> Increase default bandwith

-MaxInternetClientRate=20000 -> Increase default bandwith

I have removed entries that have no influence on SWAT4 and have tested the changes. I could not find any differences.

[kevinfoley]

@eezstreet I think we can close this, though it might be worth increasing the audio channels to 64 if that actually works and won't cause issues with typical hardware. I have found that we frequently run out of channels due to the ricochet sound effects. Most guns shoot at least 10 rounds per second. With bullet impact and ricochet sound effects, it's easy for a single weapon firing on full auto to saturate all of the audio channels, causing SFX to get dropped.