Remove code that destroys TF resources after failure

TF apply failure leads to pipeline exiting so remove TF destroy part that doesn't run

.gitlab-ci.yml

@@ -88,16 +88,7 @@ tf-apply:
       echo "image_ohpc defined as ${TF_VAR_image_ohpc}"
       fi
     - export TF_VAR_keypair_name="os-gen-keypair-$BUILD_DATE"
-    - |
-      terraform apply -auto-approve
-      if [ $? -ne 0 ]; then
-        echo "Terraform apply failed. Running terraform destroy..."
-        terraform destroy -auto-approve
-        TF_SUCCESS=false
-      else
-        TF_SUCCESS=true
-      fi
-      echo "Terraform success: $TF_SUCCESS"
+    - terraform apply -auto-approve
     - export instance_floating_ip=$(terraform output -raw floating_ip_ohpc)
     - export instance_id=$(terraform output -raw xdmod_instance_id)
     - echo "instance_floating_ip=${instance_floating_ip}" | tee -a $CI_PROJECT_DIR/vars.env