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remove Who Uses ViewComponent section #8512

Job	Run time
test (Rails 7.2, Ruby 3.3)	41s
test (Rails 8.1, Ruby 3.4)	30s
Test compatibility with Primer ViewComponents (main)	19m 21s
benchmark	1m 31s
test (Rails 7.1, Ruby 3.2)	38s
test (Rails 8.0, Ruby 3.4)	36s
test (Rails main, Ruby head)	38s
coverage	0s
	23m 55s