net/gcoap: remove gcoap_req_send2()
net/gcoap: remove gcoap_req_send2()

basilfx/RIOT,jasonatran/RIOT,smlng/RIOT,kYc0o/RIOT,kaspar030/RIOT,x3ro/RIOT,mtausig/RIOT,authmillenon/RIOT,authmillenon/RIOT,ant9000/RIOT,toonst/RIOT,OlegHahm/RIOT,yogo1212/RIOT,ant9000/RIOT,x3ro/RIOT,authmillenon/RIOT,OlegHahm/RIOT,kYc0o/RIOT,authmillenon/RIOT,ant9000/RIOT,jasonatran/RIOT,miri64/RIOT,toonst/RIOT,x3ro/RIOT,OlegHahm/RIOT,kYc0o/RIOT,smlng/RIOT,kaspar030/RIOT,toonst/RIOT,RIOT-OS/RIOT,yogo1212/RIOT,OTAkeys/RIOT,basilfx/RIOT,authmillenon/RIOT,OTAkeys/RIOT,x3ro/RIOT,miri64/RIOT,miri64/RIOT,jasonatran/RIOT,mtausig/RIOT,RIOT-OS/RIOT,yogo1212/RIOT,mtausig/RIOT,OlegHahm/RIOT,kaspar030/RIOT,ant9000/RIOT,kYc0o/RIOT,x3ro/RIOT,miri64/RIOT,OTAkeys/RIOT,OTAkeys/RIOT,smlng/RIOT,jasonatran/RIOT,basilfx/RIOT,mtausig/RIOT,mtausig/RIOT,smlng/RIOT,yogo1212/RIOT,basilfx/RIOT,smlng/RIOT,authmillenon/RIOT,kaspar030/RIOT,basilfx/RIOT,toonst/RIOT,RIOT-OS/RIOT,miri64/RIOT,yogo1212/RIOT,ant9000/RIOT,jasonatran/RIOT,RIOT-OS/RIOT,kYc0o/RIOT,toonst/RIOT,OlegHahm/RIOT,RIOT-OS/RIOT,yogo1212/RIOT,kaspar030/RIOT,OTAkeys/RIOT