Replaced un-needed unsafe

[jorgecarleitao]

There is likely some perf improvement given that there are less bound checks, but I have not benched it.

[codecov]

Codecov Report

Merging #755 (05e0af0) into main (2493f7d) will decrease coverage by 0.01%.
The diff coverage is 56.25%.

@@            Coverage Diff             @@
##             main     #755      +/-   ##
==========================================
- Coverage   70.80%   70.79%   -0.02%     
==========================================
  Files         313      313              
  Lines       16930    17095     +165     
==========================================
+ Hits        11988    12103     +115     
- Misses       4942     4992      +50     

Impacted Files	Coverage Δ
src/compute/aggregate/min_max.rs	65.90% <56.25%> (-0.76%)	⬇️
src/compute/comparison/mod.rs	38.82% <0.00%> (-0.72%)	⬇️
src/compute/nullif.rs	0.00% <0.00%> (ø)
src/io/parquet/write/stream.rs	0.00% <0.00%> (ø)
src/compute/comparison/primitive.rs	100.00% <0.00%> (ø)
src/io/parquet/read/nested_utils.rs	78.43% <0.00%> (+0.98%)	⬆️
src/io/json/read/infer_schema.rs	86.98% <0.00%> (+6.49%)	⬆️

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