Remove unused managed_allocator

[vyasr]

Description

The managed_allocator class is not used anywhere. All uses of cuco maps or the concurrent_unordered_map just use the default_allocator.

Checklist

• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.

[vyasr]

CC @PointKernel @bdice

[bdice]

Yup. I saw this recently and agree with its removal. I checked broadly for any uses in other packages -- this is dead code.

[vyasr]

rerun tests

[vyasr]

rerun tests

[codecov]

Codecov Report

Base: 87.40% // Head: 86.90% // Decreases project coverage by -0.50% ⚠️

Coverage data is based on head (5de1a06) compared to base (f72c4ce).
Patch has no changes to coverable lines.

Additional details and impacted files

@@               Coverage Diff                @@
##           branch-22.12   #12005      +/-   ##
================================================
- Coverage         87.40%   86.90%   -0.51%     
================================================
  Files               133      133              
  Lines             21833    21977     +144     
================================================
+ Hits              19084    19099      +15     
- Misses             2749     2878     +129     

Impacted Files	Coverage Δ
python/strings_udf/strings_udf/lowering.py	0.00% <0.00%> (-84.40%)	⬇️
python/strings_udf/strings_udf/_typing.py	81.05% <0.00%> (-14.74%)	⬇️
python/strings_udf/strings_udf/__init__.py	84.31% <0.00%> (-12.57%)	⬇️
python/cudf/cudf/io/text.py	91.66% <0.00%> (-8.34%)	⬇️
python/cudf/cudf/core/_base_index.py	82.20% <0.00%> (-3.35%)	⬇️
python/cudf/cudf/core/column/lists.py	92.78% <0.00%> (-0.97%)	⬇️
python/cudf/cudf/testing/dataset_generator.py	72.83% <0.00%> (-0.42%)	⬇️
python/dask_cudf/dask_cudf/core.py	73.72% <0.00%> (-0.41%)	⬇️
python/dask_cudf/dask_cudf/backends.py	84.90% <0.00%> (-0.37%)	⬇️
python/cudf/cudf/core/tools/datetimes.py	84.19% <0.00%> (-0.31%)	⬇️
... and 24 more

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[bdice]

@gpucibot merge