[v4] remove deprecated inputs/outputs

[crazy-max]

• setup-buildx-action/action.yml

  Lines 57 to 70 in 8d2750c

  	# TODO: remove deprecated config, config-inline and install inputs
  	config:
  	description: 'BuildKit daemon config file'
  	deprecationMessage: 'Use buildkitd-config instead'
  	required: false
  	config-inline:
  	description: 'Inline BuildKit daemon config'
  	deprecationMessage: 'Use buildkitd-config-inline instead'
  	required: false
  	install:
  	description: 'Sets up docker build command as an alias to docker buildx build'
  	deprecationMessage: '"docker buildx install" command is deprecated and will be removed in a future release, use BUILDX_BUILDER environment variable instead'
  	default: 'false'
  	required: false

• setup-buildx-action/src/main.ts

  Lines 221 to 223 in 8d2750c

  	core.setOutput('endpoint', firstNode.endpoint); // TODO: deprecated, to be removed in a later version
  	core.setOutput('status', firstNode.status); // TODO: deprecated, to be removed in a later version
  	core.setOutput('flags', firstNode['buildkitd-flags']); // TODO: deprecated, to be removed in a later version