[chore] Remove unnecessary Host implementation funcs #43540

Job	Run time
collector-build	5m 53s
docker-build	6m 10s
supervisor-test	42s
kubernetes-test-matrix (v1.30.0, receiver/k8sclusterreceiver)	4m 29s
kubernetes-test-matrix (v1.30.0, processor/k8sattributesprocessor)	6m 14s
kubernetes-test-matrix (v1.30.0, receiver/kubeletstatsreceiver)	4m 8s
kubernetes-test-matrix (v1.30.0, receiver/k8sobjectsreceiver)	3m 0s
kubernetes-test-matrix (v1.23.17, receiver/k8sclusterreceiver)	4m 59s
kubernetes-test-matrix (v1.23.17, processor/k8sattributesprocessor)	6m 42s
kubernetes-test-matrix (v1.23.17, receiver/kubeletstatsreceiver)	4m 11s
kubernetes-test-matrix (v1.23.17, receiver/k8sobjectsreceiver)	3m 3s
kubernetes-test	1s
	49m 32s

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