Builds fix

[pep8speaks]

Hello @MorrisNein! Thanks for opening this PR. We checked the lines you've touched for PEP 8 issues, and found:

• In the file experiments/fedot_warm_start/run.py:

Line 38:1: E402 module level import not at top of file Line 39:1: E402 module level import not at top of file Line 40:1: E402 module level import not at top of file Line 43:1: E402 module level import not at top of file Line 523:121: E501 line too long (149 > 120 characters) Line 577:121: E501 line too long (157 > 120 characters) Line 596:84: F821 undefined name 'e'

• In the file gamlet/approaches/knn_similarity_model_advice.py:

Line 7:1: F401 'pandas as pd' imported but unused

• In the file gamlet/components/meta_features_extractors/pymfe_extractor.py:

Line 15:1: F811 redefinition of unused 'DatasetMetaFeatures' from line 14