Remove no longer used environment files - older upgrade workflows

In I7831d20eae6ab9668a919b451301fe669e2b1346 we removed some of
the old upgrades but left the environment files removed here.

Change-Id: Ib3eca5687285b280832d19b647c3b4aa3d9ac36d

environments/major-upgrade-aodh-migration.yaml

@@ -1,6 +0,0 @@
-resource_registry:
-  # aodh data migration
-  OS::TripleO::Tasks::UpdateWorkflow: ../extraconfig/tasks/mitaka_to_newton_aodh_data_migration.yaml
-
-  # no-op the rest
-  OS::TripleO::PostDeploySteps: OS::Heat::None

environments/major-upgrade-ceilometer-wsgi-mitaka-newton.yaml

@@ -1,7 +0,0 @@
-resource_registry:
-
-  # This initiates the upgrades for ceilometer api to run under apache wsgi
-  OS::TripleO::Tasks::UpdateWorkflow: ../extraconfig/tasks/major_upgrade_ceilometer_wsgi_mitaka_newton.yaml
-
-  # no-op the rest
-  OS::TripleO::PostDeploySteps: OS::Heat::None

environments/major-upgrade-pacemaker-converge.yaml

@@ -1,6 +0,0 @@
-parameter_defaults:
-  UpgradeLevelNovaCompute: ''
-
-resource_registry:
-  OS::TripleO::Services::SaharaApi: ../puppet/services/sahara-api.yaml
-  OS::TripleO::Services::SaharaEngine: ../puppet/services/sahara-engine.yaml

environments/major-upgrade-pacemaker-init.yaml

@@ -1,6 +0,0 @@
-parameter_defaults:
-  UpgradeLevelNovaCompute: mitaka
-
-resource_registry:
-  OS::TripleO::Tasks::UpdateWorkflow: ../extraconfig/tasks/major_upgrade_pacemaker_init.yaml
-  OS::TripleO::PostDeploySteps: OS::Heat::None

environments/major-upgrade-pacemaker.yaml

@@ -1,6 +0,0 @@
-parameter_defaults:
-  UpgradeLevelNovaCompute: mitaka
-
-resource_registry:
-  OS::TripleO::Tasks::UpdateWorkflow: ../extraconfig/tasks/major_upgrade_pacemaker.yaml
-  OS::TripleO::PostDeploySteps: OS::Heat::None

environments/major-upgrade-remove-sahara.yaml

@@ -1,6 +0,0 @@
-parameter_defaults:
-  KeepSaharaServicesOnUpgrade: false
-resource_registry:
-  OS::TripleO::Services::SaharaApi: OS::Heat::None
-  OS::TripleO::Services::SaharaEngine: OS::Heat::None
-