[chore] Remove unmaintained file receiver #26232

Job	Run time
docker-build	7m 58s
collector-build	7m 26s
supervisor-test	51s
kubernetes-test-matrix (v1.26.0, receiver/k8sclusterreceiver)	4m 47s
kubernetes-test-matrix (v1.26.0, processor/k8sattributesprocessor)	3m 17s
kubernetes-test-matrix (v1.26.0, receiver/kubeletstatsreceiver)	4m 44s
kubernetes-test-matrix (v1.26.0, receiver/k8sobjectsreceiver)	3m 11s
kubernetes-test-matrix (v1.25.3, receiver/k8sclusterreceiver)	5m 11s
kubernetes-test-matrix (v1.25.3, processor/k8sattributesprocessor)	3m 40s
kubernetes-test-matrix (v1.25.3, receiver/kubeletstatsreceiver)	4m 14s
kubernetes-test-matrix (v1.25.3, receiver/k8sobjectsreceiver)	3m 36s
kubernetes-test-matrix (v1.24.7, receiver/k8sclusterreceiver)	4m 48s
kubernetes-test-matrix (v1.24.7, processor/k8sattributesprocessor)	3m 40s
kubernetes-test-matrix (v1.24.7, receiver/kubeletstatsreceiver)	4m 17s
kubernetes-test-matrix (v1.24.7, receiver/k8sobjectsreceiver)	3m 19s
kubernetes-test-matrix (v1.23.13, receiver/k8sclusterreceiver)	4m 46s
kubernetes-test-matrix (v1.23.13, processor/k8sattributesprocessor)	3m 28s
kubernetes-test-matrix (v1.23.13, receiver/kubeletstatsreceiver)	4m 15s
kubernetes-test-matrix (v1.23.13, receiver/k8sobjectsreceiver)	3m 16s
kubernetes-test	1s
	1h 20m 45s

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