Removing vestigial container

[mtauraso]

Per slack conversation this is dead code.

[github-actions]

Before [7c56dc6]	After [56516b6]	Ratio	Benchmark (Parameter)
131±0.8ms	133±2ms	1.01	benchmarks.time_feature_creation
188M	188M	1	benchmarks.peakmem_learn_loop('RandomForest')
148±2ms	148±1ms	1	benchmarks.time_learn_loop('KNN', 'RandomSampling')
152±2ms	152±0.9ms	1	benchmarks.time_learn_loop('KNN', 'UncSampling')
199M	197M	0.99	benchmarks.peakmem_learn_loop('KNN')
2.60±0.01s	2.55±0.01s	0.98	benchmarks.time_learn_loop('RandomForest', 'RandomSampling')
2.61±0.01s	2.55±0.01s	0.98	benchmarks.time_learn_loop('RandomForest', 'UncSampling')

Click here to view all benchmarks.