metal3: Remove release-1.5 tests

Change-Id: I1c84da55a9d5492be05d04f613e88fea0e250b36
Signed-off-by: Huy Mai <huy.mai@est.tech>
diff --git a/jjb/metal3/projects.yml b/jjb/metal3/projects.yml
index 633b207..b996128 100644
--- a/jjb/metal3/projects.yml
+++ b/jjb/metal3/projects.yml
@@ -97,11 +97,6 @@
             capm3_version: v1beta1
             capm3_release_branch: release-1.6
             bmo_release_branch: release-0.5
-        - release-1-5:
-            capi_version: v1beta1
-            capm3_version: v1beta1
-            capm3_release_branch: release-1.5
-            bmo_release_branch: release-0.4
     - capm3_periodic_e2e_integration_tests_prow:
         capm3_target_branch:
         - main:
@@ -158,13 +153,6 @@
             bmo_release_branch: release-0.5
             capm3_target_branch: release-1-6
             ginkgo_focus: pivoting
-        - release-1-5-pivoting:
-            capi_version: v1beta1
-            capm3_version: v1beta1
-            capm3_release_branch: release-1.5
-            bmo_release_branch: release-0.4
-            capm3_target_branch: release-1-5
-            ginkgo_focus: pivoting
         - main-remediation:
             capi_version: v1beta1
             capm3_version: v1beta1
@@ -193,13 +181,6 @@
             bmo_release_branch: release-0.5
             capm3_target_branch: release-1-6
             ginkgo_focus: remediation
-        - release-1-5-remediation:
-            capi_version: v1beta1
-            capm3_version: v1beta1
-            capm3_release_branch: release-1.5
-            bmo_release_branch: release-0.4
-            capm3_target_branch: release-1-5
-            ginkgo_focus: remediation
         - main-features:
             capi_version: v1beta1
             capm3_version: v1beta1
@@ -228,13 +209,6 @@
             bmo_release_branch: release-0.5
             capm3_target_branch: release-1-6
             ginkgo_focus: features
-        - release-1-5-features:
-            capi_version: v1beta1
-            capm3_version: v1beta1
-            capm3_release_branch: release-1.5
-            bmo_release_branch: release-0.4
-            capm3_target_branch: release-1-5
-            ginkgo_focus: features
     - capm3_periodic_e2e_feature_tests_prow:
         capm3_target_job:
         - main-pivoting:
@@ -269,14 +243,6 @@
             capm3_target_branch: release-1-6
             ginkgo_focus: pivoting
             schedule: "H 0 2-30/2 * *" # Runs on even days 0 AM
-        - release-1-5-pivoting:
-            capi_version: v1beta1
-            capm3_version: v1beta1
-            capm3_release_branch: release-1.5
-            bmo_release_branch: release-0.4
-            capm3_target_branch: release-1-5
-            ginkgo_focus: pivoting
-            schedule: "H 0 1-31/2 * *" # Runs on odd days 0 AM
         - main-remediation:
             capi_version: v1beta1
             capm3_version: v1beta1
@@ -309,14 +275,6 @@
             capm3_target_branch: release-1-6
             ginkgo_focus: remediation
             schedule: "H 0 2-30/2 * *" # Runs on even days 0 AM
-        - release-1-5-remediation:
-            capi_version: v1beta1
-            capm3_version: v1beta1
-            capm3_release_branch: release-1.5
-            bmo_release_branch: release-0.4
-            capm3_target_branch: release-1-5
-            ginkgo_focus: remediation
-            schedule: "H 0 1-31/2 * *" # Runs on odd days 0 AM
         - main-features:
             capi_version: v1beta1
             capm3_version: v1beta1
@@ -349,14 +307,6 @@
             capm3_target_branch: release-1-6
             ginkgo_focus: features
             schedule: "H 0 2-30/2 * *" # Runs on even days 0 AM
-        - release-1-5-features:
-            capi_version: v1beta1
-            capm3_version: v1beta1
-            capm3_release_branch: release-1.5
-            bmo_release_branch: release-0.4
-            capm3_target_branch: release-1-5
-            ginkgo_focus: features
-            schedule: "H 0 1-31/2 * *" # Runs on odd days 0 AM
         exclude:
         - image_os: ubuntu # This is to disable the tests running on ubuntu, to save resources
     - capm3_e2e_clusterctl_upgrade_tests_prow:
@@ -401,12 +351,6 @@
             capm3_release_branch: release-1.6
             bmo_release_branch: release-0.5
             capm3_target_branch: release-1-6
-        - 1-26-1-27:
-            k8s_version_upgrade_from: v1.26.4
-            k8s_version_upgrade_to: v1.27.4
-            capm3_release_branch: release-1.5
-            bmo_release_branch: release-0.4
-            capm3_target_branch: release-1-5
         exclude:
         - image_os: centos
     - capm3_periodic_e2e_clusterctl_upgrade_tests_prow:
@@ -459,13 +403,6 @@
             bmo_release_branch: release-0.5
             capm3_target_branch: release-1-6
             schedule: "H 3 * * 3"
-        - 1-26-1-27:
-            k8s_version_upgrade_from: v1.26.4
-            k8s_version_upgrade_to: v1.27.4
-            capm3_release_branch: release-1.5
-            bmo_release_branch: release-0.4
-            capm3_target_branch: release-1-5
-            schedule: "H 3 * * 6"
         exclude:
         - image_os: centos
     - capm3_periodic_e2e_ephemeral_tests:
@@ -586,15 +523,6 @@
             - 'main'
             - 'release-1.6'
             - 'release-0.5'
-        - release-1-5:
-            capi_version: v1beta1
-            capm3_version: v1beta1
-            capm3_release_branch: release-1.5
-            bmo_release_branch: release-0.4
-            target_branches:
-            - 'main'
-            - 'release-1.5'
-            - 'release-0.4'
     - dev_env_periodic_integration_tests_prow:
         capm3_target_branch:
         - main: