Files
Etienne Perot e79b0f517e runsc gofer: Remove /proc unmounter and unmount in-process instead
Saves about 3ms on the gofer hot path.

Benchmarks:

```
                 │     base     │                  new                  │
                 │    sec/op    │    sec/op     vs base                 │
  RunscDo           75.78m ± 3%   73.06m ±  2%   -3.59% (p=0.012 n=200)
  GoferInit        10.403m ± 5%   7.364m ± 13%  -29.21% (p=0.000 n=25)
```
2026-08-14 17:56:58 -07:00
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