No current use cases for soong.config and user-editable local configuration options for Soong, so let's remove it to reduce the API surface. The MegaDevice configuration is used for building every module, for every cpu variant, for every architecture, but it apparently isn't used for a while now. Test: m nothing Test: TH Fixes: 174188200 Change-Id: I2550e70ff6f9c8b57e9a7cc517d6a119a032a27a