[#3518] Remove incomplete implementation of menu aria role from Blacklight::System::DropdownComponent #3318

Job	Run time
lint	35s
docker_build	27s
test (ruby 3.3 / rails 8.0.1 )	3m 33s
test (ruby 3.3 / rails 7.1.5.1 / Propshaft)	3m 57s
test (ruby 3.3 / rails 7.1.5.1 )	3m 19s
test (ruby 3.1 / rails 7.1.5.1 )	3m 34s
test (ruby 3.3 / rails 7.2.2.1 / Propshaft, esbuild)	3m 57s
test (ruby 3.3 / rails 8.0.1 / esbuild)	3m 49s
test (ruby 3.2 / rails 7.1.5.1 Solr 8.11.2)	3m 45s
test (ruby 3.3 / rails 7.1.5.1 / API)	2m 19s
test (ruby 3.3 / rails 7.2.2.1 )	3m 36s
	32m 51s

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