Remove topical events from travel advice schema #262

Job	Run time
Test Info Frontend / Run RSpec	39s
Test Licence Finder / Run RSpec	3m 53s
Test Manuals Publisher / Run RSpec	2m 31s
Test Publisher / Run Minitest	8m 9s
Test Search Admin / Run RSpec	1m 50s
Test Service Manual Publisher / Run RSpec	1m 33s
Test Search API / Run RSpec	2m 51s
Test Short URL Manager / Run RSpec	50s
Test Smart Answers / Run Minitest	5m 0s
Test Specialist Publisher / Run RSpec	2m 21s
Test Travel Advice Publisher / Run RSpec	2m 11s
Test Whitehall / Run Minitest	17m 5s
	48m 53s

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