Remove hack that prevents the emergency banner appearing on HM Queen Elizabeth II's page. #1861

Job	Run time
Integration tests	36s
CodeQL SAST scan / Analyze	1m 49s
Lint ERB / Lint ERB	9s
Dependency Review scan / dependency-review-push	0s
Dependency Review scan / dependency-review-pr	7s
Lint JavaScript / Run Standardx	17s
Lint Ruby / Run RuboCop	16s
Security Analysis / Run Brakeman	27s
Lint SCSS / Run Stylelint	13s
Run Pact tests / Verify pact tests	15s
Test JavaScript / Run Jasmine	48s
Test Ruby / Run RSpec	55s
	5m 52s

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