Revert "Copy IM artifacts to unstable repo during stage3"

This reverts commit 508cd46e25f7c8e467948142788ef9c94d7416a2.
diff --git a/jenkins/ci-pipelines/ci_stage_3.groovy b/jenkins/ci-pipelines/ci_stage_3.groovy
index caa95df..6b1198b 100644
--- a/jenkins/ci-pipelines/ci_stage_3.groovy
+++ b/jenkins/ci-pipelines/ci_stage_3.groovy
@@ -59,7 +59,7 @@
                 // given target UPSTREAM_SUFFIX
 
                 dir("${RELEASE}") {
-                    def list = ["SO", "UI", "RO", "openvim", "osmclient", "IM"]
+                    def list = ["SO", "UI", "RO", "openvim", "osmclient"]
                     for (component in list) {
                         step ([$class: 'CopyArtifact',
                                projectName: "${component}${params.UPSTREAM_SUFFIX}/${GERRIT_BRANCH}"])