Revert "Fix tooltips not visible for NVD3 charts on Firefox (#7822) (#7929)" (#8147)
Revert "Fix tooltips not visible for NVD3 charts on Firefox (#7822) (#7929)" (#8147)

This reverts commit 6df2a713e4189dc19168cd7ace754451e9c38d01.
mistercrunch/panoramix,airbnb/superset,zhouyao1994/incubator-superset,mistercrunch/panoramix,zhouyao1994/incubator-superset,airbnb/caravel,apache/incubator-superset,airbnb/caravel,zhouyao1994/incubator-superset,zhouyao1994/incubator-superset,mistercrunch/panoramix,airbnb/superset,apache/incubator-superset,apache/incubator-superset,apache/incubator-superset,airbnb/superset,airbnb/superset,zhouyao1994/incubator-superset,airbnb/caravel,mistercrunch/panoramix,airbnb/caravel,apache/incubator-superset