Memory allocator simplifications

[maleadt]

No description provided.

[codecov]

Codecov Report

Merging #361 into master will increase coverage by 0.02%.
The diff coverage is 77.77%.

@@            Coverage Diff             @@
##           master     #361      +/-   ##
==========================================
+ Coverage   79.44%   79.46%   +0.02%     
==========================================
  Files         158      158              
  Lines        8797     8782      -15     
==========================================
- Hits         6989     6979      -10     
+ Misses       1808     1803       -5     

Impacted Files	Coverage Δ
src/array.jl	92.18% <0.00%> (ø)
src/pool/split.jl	92.03% <66.66%> (+0.45%)	⬆️
src/pool.jl	77.60% <75.00%> (+0.53%)	⬆️
lib/cudadrv/memory.jl	85.41% <85.71%> (+0.15%)	⬆️
lib/cudadrv/module/global.jl	87.50% <100.00%> (ø)
src/pool/binned.jl	75.37% <100.00%> (-0.13%)	⬇️
src/pool/none.jl	84.61% <100.00%> (-0.57%)	⬇️
src/pool/simple.jl	89.87% <100.00%> (-0.13%)	⬇️

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