remove BMO periodic badge as it no longer exists

BMO periodics have moved to GH actions.

Signed-off-by: Tuomo Tanskanen <[email protected]>

README.md

@@ -5,7 +5,6 @@
 [![OpenSSF Scorecard](https://api.securityscorecards.dev/projects/github.com/metal3-io/baremetal-operator/badge)](https://securityscorecards.dev/viewer/?uri=github.com/metal3-io/baremetal-operator)
 [![Ubuntu daily main build status](https://jenkins.nordix.org/buildStatus/icon?job=metal3-periodic-ubuntu-e2e-integration-test-main&subject=Ubuntu%20daily%20main)](https://jenkins.nordix.org/view/Metal3/job/metal3-periodic-ubuntu-e2e-integration-test-main/)
 [![CentOS daily main build status](https://jenkins.nordix.org/buildStatus/icon?job=metal3-periodic-centos-e2e-integration-test-main&subject=CentOS%20daily%20main)](https://jenkins.nordix.org/view/Metal3/job/metal3-periodic-centos-e2e-integration-test-main/)
-[![BMO e2e periodic main](https://jenkins.nordix.org/view/Metal3%20Periodic/job/metal3-bmo-e2e-test-periodic/badge/icon?subject=BMO%20e2e%20periodic%20main)](https://jenkins.nordix.org/view/Metal3%20Periodic/job/metal3-bmo-e2e-test-periodic/)
 
 The Bare Metal Operator implements a Kubernetes API for managing bare metal
 hosts. It maintains an inventory of available hosts as instances of the