Merge pull request #224 from ifad/chore/remove-redundant-self #409

Job	Run time
Ruby specs (2.6, rails_6.0, stable)	1m 57s
Ruby specs (2.6, rails_6.1, stable)	2m 7s
Ruby specs (2.7, rails_6.0, stable)	2m 1s
Ruby specs (2.7, rails_6.1, stable)	2m 5s
Ruby specs (2.7, rails_7.0, stable)	2m 20s
Ruby specs (3.0, rails_6.0, stable)	1m 40s
Ruby specs (3.0, rails_6.1, stable)	1m 50s
Ruby specs (3.0, rails_7.0, stable)	1m 39s
Ruby specs (3.1, rails_7.0, stable)	1m 46s
Ruby specs (3.2, rails_7.0, stable)	1m 44s
Ruby specs (2.7, rails_edge, experimental)	2m 3s
Ruby specs (3.0, rails_edge, experimental)	2m 9s
Ruby specs (3.1, rails_edge, experimental)	1m 46s
Ruby specs (3.2, rails_edge, experimental)	2m 23s
Ruby specs (head, rails_7.0, experimental)	1m 39s
Ruby specs (head, rails_edge, experimental)	2m 3s
	31m 12s

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