swagger-cli is deprecated, let's remove it from the dependencies

swagger-cli's GitHub repo is now archived https://github.com/APIDevTools/swagger-cli. The package is deprecated.

Furthermore, when you run npm install, there's this warning saying:

deprecated @apidevtools/swagger-cli@4.0.4: This package has been abandoned. Please switch to using the actively maintained @redocly/cli

The good news is @redocly/cli is already being used in setup-deps.sh, alongside swagger-cli. So, there's no need for a replacement

Lines 272 to 273 in 62077d6

    
           npx swagger-cli validate $swagger_file 
        
           npx @redocly/cli lint $swagger_file

What needs to be done is:

	npx swagger-cli validate $swagger_file
	npx @redocly/cli lint $swagger_file