Simplified IPC code.

[jorgecarleitao]

Makes it more obvious why unsafe there is sound.

[codecov]

Codecov Report

Merging #277 (70825fd) into main (4c18c0a) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main     #277   +/-   ##
=======================================
  Coverage   77.14%   77.15%           
=======================================
  Files         254      254           
  Lines       20648    20649    +1     
=======================================
+ Hits        15929    15931    +2     
+ Misses       4719     4718    -1     

Impacted Files	Coverage Δ
src/io/ipc/read/read_basic.rs	88.50% <100.00%> (+0.13%)	⬆️
src/compute/arithmetics/mod.rs	51.87% <0.00%> (+0.75%)	⬆️

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