CLN: remove old vb_suite files (now asv_bench)
Removed the full `vb_suite` directory. We don't use it anymore, everything has been converted to the asv benchmarks, and we can always find it in the git history.
hmm thought there was an open issue / check box for this somewhere, did a quick search but didn't find it # [Codecov](https://codecov.io/gh/pandas-dev/pandas/pull/16034?src=pr&el=h1) Report
> Merging [#16034](https://codecov.io/gh/pandas-dev/pandas/pull/16034?src=pr&el=desc) into [master](https://codecov.io/gh/pandas-dev/pandas/commit/89bd26871727615aeef63be6243ced4ed5501f26?src=pr&el=desc) will **not change** coverage.
> The diff coverage is `n/a`.

[![Impacted file tree graph](https://codecov.io/gh/pandas-dev/pandas/pull/16034/graphs/tree.svg?width=650&height=150&src=pr&token=eZ4WkYLtcO)](https://codecov.io/gh/pandas-dev/pandas/pull/16034?src=pr&el=tree)

```diff
@@           Coverage Diff           @@
##           master   #16034   +/-   ##
=======================================
  Coverage      91%      91%           
=======================================
  Files         153      153           
  Lines       50469    50469           
=======================================
  Hits        45927    45927           
  Misses       4542     4542
```

| Flag | Coverage Δ | |
|---|---|---|
| #multiple | `88.76% <ø> (ø)` | :arrow_up: |
| #single | `40.43% <ø> (ø)` | :arrow_up: |


------

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> `Δ = absolute <relative> (impact)`, `ø = not affected`, `? = missing data`
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