It means that weapon removal is still not the prevalent tech choice, and hence does not render Medivh unplayable.

The matchup data is still a mismash of pre-nerf and post-nerf data. Most of those decks lost something with the nerfs.

Edit: Check out the Over time tab, it shows a nice view of the winrate: https://hsreplay.net/archetypes/147/jade-druid#tab=overtime

I cannot quite agree that Jade Druid died with the patch. Perhaps it is not exactly tier 1 anymore, but it is a solid tier 2 deck according to HSreplay statistics, for example. I actually played a bunch of Jade Druid for the guide and had a good win rate playing it, it is an easy climbing deck still.

As for Medivh, yes, there is some more weapon removal now than before (roughly 15% of decks run weapon removal now compared to mere 5% pre-patch, but the trend is already going down) but it is nowhere near as prevalent as Silence (roughly 50%). Furthermore, matchups where you want Medivh, such as Warlock, hardly run weapon removal still.