removed migration guide from readme
removed migration guide from readme

senchalabs/connect,khirayama/connect,RoseTHERESA/connect,chinazhaghai/connect,khalerc/connect,tanveer12332/connect,brianloveswords/connect,llwanghong/connect,mi2oon/connect,liuwei9413/connect,keenwon/connect,qitianchan/connect,dkfiresky/connect,gtomitsuka/connect,austincitylimits/connect,davehorton/drachtio,lian774739140/connect,wghust/connect,behind2/connect,RickyDan/connect,mi2oon/connect