soundgrain is marked for autoremoval from testing

[Debian testing autoremoval watch]

soundgrain 6.0.1-2 is marked for autoremoval from testing on 2020-08-04

It (build-)depends on packages with these RC bugs:
963283: wxpython4.0: FTBFS: 
../../../../sip/cpp/sip_corewxSplitterRenderParams.cpp:31:125: error: use of 
deleted function ‘wxSplitterRenderParams& 
wxSplitterRenderParams::operator=(const wxSplitterRenderParams&)’