docs(readme): license info in README is redundant (#10314)
docs(readme): license info in README is redundant (#10314)

Info in in the standard `LICENSE.txt` that GitHub picks up properly and
surfaces in the east panel in the main page.
airbnb/caravel,zhouyao1994/incubator-superset,apache/incubator-superset,mistercrunch/panoramix,apache/incubator-superset,airbnb/caravel,apache/incubator-superset,zhouyao1994/incubator-superset,airbnb/caravel,airbnb/superset,mistercrunch/panoramix,apache/incubator-superset,zhouyao1994/incubator-superset,airbnb/superset,apache/incubator-superset,mistercrunch/panoramix,airbnb/superset,zhouyao1994/incubator-superset,airbnb/superset,mistercrunch/panoramix,airbnb/caravel,zhouyao1994/incubator-superset