README: Remove text about DCO
README: Remove text about DCO

We probably don't need a DCO, but only CLA.

Refs SHOOP-987

jacobsenanaizabel/shoop,akx/shoop,shoopio/shoop,jacobsenanaizabel/shoop,jorge-marques/shoop,lawzou/shoop,arth-co/shoop,drayanaindra/shoop,jacobsenanaizabel/shoop,suutari/shoop,jorge-marques/shoop,shoopio/shoop,jaywink/shoop,taedori81/shoop,shawnadelic/shuup,jaywink/shoop,drayanaindra/shoop,suutari-ai/shoop,arth-co/shoop,drayanaindra/shoop,jaywink/shoop,taedori81/shoop,hrayr-artunyan/shuup,taedori81/shoop,lawzou/shoop,shoopio/shoop,akx/shoop,akx/shoop,suutari/shoop,hrayr-artunyan/shuup,janusnic/shoop,janusnic/shoop,suutari-ai/shoop,lawzou/shoop,janusnic/shoop,jorge-marques/shoop,suutari/shoop,shawnadelic/shuup,suutari-ai/shoop,hrayr-artunyan/shuup,shawnadelic/shuup,arth-co/shoop