Revert #1311 - false negatives for `Rails/ActionControllerFlashBeforeRender` #311

Job	Run time
Check the oldest supported RuboCop version	50s
JRuby 9.4	3m 10s
Check documentation syntax	33s
Ruby 2.7	56s
Ruby 3.0	59s
Prism	51s
Ruby 3.1	54s
Ruby 3.2	43s
Ruby 3.3	54s
Ruby head	48s
	10m 38s

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