Fixing parquet benchmarks

[rgsl888prabhu]

return_filemetadata was removed in one of the recent PR, and missed to remove it in benchmarks.

[codereport]

lgtm 👍

[codecov]

Codecov Report

Merging #7214 (41c7eff) into branch-0.18 (8860baf) will increase coverage by 0.11%.
The diff coverage is 92.85%.

@@               Coverage Diff               @@
##           branch-0.18    #7214      +/-   ##
===============================================
+ Coverage        82.09%   82.20%   +0.11%     
===============================================
  Files               97       98       +1     
  Lines            16474    16692     +218     
===============================================
+ Hits             13524    13722     +198     
- Misses            2950     2970      +20     

Impacted Files	Coverage Δ
python/cudf/cudf/_lib/__init__.py	100.00% <ø> (ø)
python/cudf/cudf/core/column/lists.py	91.66% <ø> (-0.09%)	⬇️
python/cudf/cudf/core/column/numerical.py	94.13% <ø> (-0.29%)	⬇️
python/cudf/cudf/core/column/string.py	86.65% <ø> (ø)
python/cudf/cudf/core/dataframe.py	90.49% <ø> (-0.22%)	⬇️
python/cudf/cudf/core/dtypes.py	89.94% <ø> (-0.45%)	⬇️
python/cudf/cudf/core/frame.py	90.10% <ø> (+0.12%)	⬆️
python/cudf/cudf/core/groupby/groupby.py	93.59% <ø> (ø)
python/cudf/cudf/core/multiindex.py	82.19% <ø> (+0.05%)	⬆️
python/cudf/cudf/core/reshape.py	91.19% <ø> (+0.16%)	⬆️
... and 37 more

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[harrism]

@gpuciboth merge

[harrism]

@gpucibot merge