🐛 FIX: use @file_get_contents to suppress warning if file does not exist #6977

Job	Run time
Parse.ly: 3.1 filter_enabled	10m 13s
Parse.ly: 3.1 filter_disabled	8m 45s
Parse.ly: 3.1 option_enabled	8m 26s
Parse.ly: 3.1 option_disabled	8m 36s
Parse.ly: 3.1 filter_and_option_enabled	8m 37s
Parse.ly: 3.1 filter_and_option_disabled	8m 20s
Parse.ly: filter_enabled	8m 38s
Parse.ly: filter_disabled	8m 32s
Parse.ly: option_enabled	8m 28s
Parse.ly: option_disabled	8m 46s
Parse.ly: filter_and_option_enabled	8m 27s
Parse.ly: filter_and_option_disabled	8m 28s
	1h 44m 16s

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