deps: simplify os dependencies

[q9f]

Just testing if we need all of them.

[codecov]

Codecov Report

Merging #1496 (8d7e3a7) into main (cf49ba7) will increase coverage by 0.10%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #1496      +/-   ##
==========================================
+ Coverage   44.30%   44.40%   +0.10%     
==========================================
  Files         323      319       -4     
  Lines       28414    28231     -183     
==========================================
- Hits        12588    12537      -51     
+ Misses      15826    15694     -132     

Impacted Files	Coverage Δ
blockchain/message_pool/src/msg_chain.rs	80.24% <0.00%> (-0.41%)	⬇️
vm/actor/src/builtin/miner/mod.rs	33.49% <0.00%> (-0.05%)	⬇️
types/src/lib.rs	57.14% <0.00%> (ø)
types/src/sector/post.rs	27.27% <0.00%> (ø)
types/src/randomness.rs
types/src/sector/mod.rs
types/src/sector/registered_proof.rs
encoding/src/bytes.rs

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[lemmih]

Looks good. Seems like we didn't need all of those packages.