Mathlib v3 is deprecated. Go to Mathlib v4

Commit 2023-01-20 23:55 a63928c3

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chore(analysis/convex/topology): split (#18187) Split the facts about the topology of convex sets into two files, for topological vector spaces and normed spaces. This makes the former a more elementary file, as indeed it feels like it should be. It also slightly decreases the length of the longest path in mathlib.

Estimated changes

deleted theorem bounded_convex_hull
deleted theorem convex.cthickening
deleted theorem convex.thickening
deleted theorem convex_ball
deleted theorem convex_closed_ball
deleted theorem convex_hull_diam
deleted theorem convex_hull_ediam
deleted theorem convex_on_dist
deleted theorem convex_on_norm
deleted theorem convex_on_univ_dist
deleted theorem convex_on_univ_norm