Revert `tests/testdata` changes and address flake8 issues

tests/testdata/pile_youtubesubtitles-v1-res.json

-{"results": {"pile_youtubesubtitles": {"bits_per_byte": 3.3827117222045906e-05, "byte_perplexity": 1.000023447445816, "word_perplexity": 1.0001529192262875}}, "versions": {"pile_youtubesubtitles": 1}}
+{"results": {"pile_youtubesubtitles": {"bits_per_byte": 3.3827117222045906e-05, "byte_perplexity": 1.000023447445816, "word_perplexity": 1.0001529192262875}}, "versions": {"pile_youtubesubtitles": 1}}
\ No newline at end of file

tests/testdata/piqa-v0-loglikelihood

-6048a3a2bb3ad1e6a3d98139618e06b4d7de766edd685bd38837596199c3f69f
+6048a3a2bb3ad1e6a3d98139618e06b4d7de766edd685bd38837596199c3f69f
\ No newline at end of file

tests/testdata/piqa-v0-res.json

-{"results": {"piqa": {"acc": 0.514145810663765, "acc_norm": 0.5114254624591947, "acc_norm_stderr": 0.01166277802645167, "acc_stderr": 0.011661154475524836}}, "versions": {"piqa": 0}}
+{"results": {"piqa": {"acc": 0.514145810663765, "acc_norm": 0.5114254624591947, "acc_norm_stderr": 0.01166277802645167, "acc_stderr": 0.011661154475524836}}, "versions": {"piqa": 0}}
\ No newline at end of file

tests/testdata/prost-v0-loglikelihood

-7c475f5b36a8b79f94c2be035441e7fd59dac021b0713b1fc72d256424c70b0b
+7c475f5b36a8b79f94c2be035441e7fd59dac021b0713b1fc72d256424c70b0b
\ No newline at end of file

tests/testdata/prost-v0-res.json

-{"results": {"prost": {"acc": 0.24631725021349274, "acc_norm": 0.2581127241673783, "acc_norm_stderr": 0.00319703079646546, "acc_stderr": 0.003147855968061357}}, "versions": {"prost": 0}}
+{"results": {"prost": {"acc": 0.24631725021349274, "acc_norm": 0.2581127241673783, "acc_norm_stderr": 0.00319703079646546, "acc_stderr": 0.003147855968061357}}, "versions": {"prost": 0}}
\ No newline at end of file

tests/testdata/pubmedqa-v0-loglikelihood

-7a04a1fb1d2b19db84fd15c224015d6c0306a41195a4e71fe6abd48fb4d53b9f
+7a04a1fb1d2b19db84fd15c224015d6c0306a41195a4e71fe6abd48fb4d53b9f
\ No newline at end of file

tests/testdata/pubmedqa-v0-res.json

-{"results": {"pubmedqa": {"acc": 0.324, "acc_stderr": 0.01480686473373886}}, "versions": {"pubmedqa": 0}}
+{"results": {"pubmedqa": {"acc": 0.324, "acc_stderr": 0.01480686473373886}}, "versions": {"pubmedqa": 0}}
\ No newline at end of file

tests/testdata/qa4mre_2011-v0-loglikelihood

-0d09f17c65768e797633494d2d218e4e46a26f718cab8b0bf3d156b073a8c437
+0d09f17c65768e797633494d2d218e4e46a26f718cab8b0bf3d156b073a8c437
\ No newline at end of file

tests/testdata/qa4mre_2011-v0-res.json

-{"results": {"qa4mre_2011": {"acc": 0.225, "acc_norm": 0.23333333333333334, "acc_norm_stderr": 0.03877199986918664, "acc_stderr": 0.0382797091741014}}, "versions": {"qa4mre_2011": 0}}
+{"results": {"qa4mre_2011": {"acc": 0.225, "acc_norm": 0.23333333333333334, "acc_norm_stderr": 0.03877199986918664, "acc_stderr": 0.0382797091741014}}, "versions": {"qa4mre_2011": 0}}
\ No newline at end of file

tests/testdata/qa4mre_2012-v0-loglikelihood

-7e17261820acb365966cb9431d93aec983b14393eaeefbc96e30a11cf58bc6df
+7e17261820acb365966cb9431d93aec983b14393eaeefbc96e30a11cf58bc6df
\ No newline at end of file

tests/testdata/qa4mre_2012-v0-res.json

-{"results": {"qa4mre_2012": {"acc": 0.15625, "acc_norm": 0.16875, "acc_norm_stderr": 0.029702236908328808, "acc_stderr": 0.02879508360159146}}, "versions": {"qa4mre_2012": 0}}
+{"results": {"qa4mre_2012": {"acc": 0.15625, "acc_norm": 0.16875, "acc_norm_stderr": 0.029702236908328808, "acc_stderr": 0.02879508360159146}}, "versions": {"qa4mre_2012": 0}}
\ No newline at end of file

tests/testdata/qa4mre_2013-v0-loglikelihood

-52fc431e94c67f983e28ebc70cf45e6c14116b0ae77dc1bf22347c705a65d054
+52fc431e94c67f983e28ebc70cf45e6c14116b0ae77dc1bf22347c705a65d054
\ No newline at end of file

tests/testdata/qa4mre_2013-v0-res.json

-{"results": {"qa4mre_2013": {"acc": 0.18309859154929578, "acc_norm": 0.22183098591549297, "acc_norm_stderr": 0.02469760575535269, "acc_stderr": 0.022989742475464973}}, "versions": {"qa4mre_2013": 0}}
+{"results": {"qa4mre_2013": {"acc": 0.18309859154929578, "acc_norm": 0.22183098591549297, "acc_norm_stderr": 0.02469760575535269, "acc_stderr": 0.022989742475464973}}, "versions": {"qa4mre_2013": 0}}
\ No newline at end of file

tests/testdata/qnli-v0-loglikelihood

-4281d4ff5cf1244358b0ea0220c67863c69fbade850696b43e8ff05138e01e12
+4281d4ff5cf1244358b0ea0220c67863c69fbade850696b43e8ff05138e01e12
\ No newline at end of file

tests/testdata/qnli-v0-res.json

-{"results": {"qnli": {"acc": 0.5108914515833791, "acc_stderr": 0.00676380528502966}}, "versions": {"qnli": 0}}
+{"results": {"qnli": {"acc": 0.5108914515833791, "acc_stderr": 0.00676380528502966}}, "versions": {"qnli": 0}}
\ No newline at end of file

tests/testdata/qqp-v0-loglikelihood

-97b551b0fc3d239aad4929a2e8e79c986891aefd9fcd19441fea0382d507889e
+97b551b0fc3d239aad4929a2e8e79c986891aefd9fcd19441fea0382d507889e
\ No newline at end of file

tests/testdata/qqp-v0-res.json

-{"results": {"qqp": {"acc": 0.49782339846648527, "acc_stderr": 0.0024866770696239894, "f1": 0.42322661288031593, "f1_stderr": 0.002695903831328166}}, "versions": {"qqp": 0}}
+{"results": {"qqp": {"acc": 0.49782339846648527, "acc_stderr": 0.0024866770696239894, "f1": 0.42322661288031593, "f1_stderr": 0.002695903831328166}}, "versions": {"qqp": 0}}
\ No newline at end of file

tests/testdata/race-v0-loglikelihood

-bdfdfab7fa1c7af0c1e161785e347b1b8071a15cbf971f6f2a9ae8c8e845199f
+bdfdfab7fa1c7af0c1e161785e347b1b8071a15cbf971f6f2a9ae8c8e845199f
\ No newline at end of file

tests/testdata/race-v0-res.json

-{"results": {"race": {"acc": 0.23253588516746412, "acc_stderr": 0.013074460615265295}}, "versions": {"race": 0}}
+{"results": {"race": {"acc": 0.23253588516746412, "acc_stderr": 0.013074460615265295}}, "versions": {"race": 0}}
\ No newline at end of file

tests/testdata/random_insertion-v0-greedy_until

-6c48baa6924f3635120f33062251c4b571b3d4e9fe46b14d91f54ddd1c857997
+6c48baa6924f3635120f33062251c4b571b3d4e9fe46b14d91f54ddd1c857997
\ No newline at end of file