Remove platform specifications from README.md
Remove platform specifications from README.md

They are on the website.

Signed-off-by: Martin Sustrik <4dd6061be1198639e8b05ce4fd5ead7a0dcaa0f4@250bpm.com>

8l/libmill,nirs/libmill,jimjag/mill,lsm/libmill,linearregression/libmill,reqshark/libmill,nirs/libmill,lsm/libmill,ebfe/libmill,sustrik/libmill,reqshark/libmill,8l/libmill,dailypips/libmill,linearregression/libmill,reqshark/libmill,linearregression/libmill,jimjag/mill,dailypips/libmill,jimjag/mill,dailypips/libmill,sustrik/libmill,sustrik/libmill,ebfe/libmill,ebfe/libmill,lsm/libmill