Removed unused `league/csv` #7592

Job	Run time
Unit tests 7.4	3m 20s
Code style 7.4	1m 27s
Unused composer dependencies 7.4	2m 35s
Unit tests 8.0	1m 10s
Code style 8.0	1m 59s
Static analysis 7.4	1m 57s
Unused composer dependencies 8.0	25s
Unit tests 8.1	1m 11s
Code style 8.1	2m 13s
Static analysis 8.0	1m 56s
Unused composer dependencies 8.1	28s
Static analysis 8.1	1m 54s
	20m 35s

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