Remove extra = symbol from cookiecutter pipeline

PROD-37197

Change-Id: If4656defb93022db1a696cfbb86d68d2594c789c
diff --git a/jobs/pipelines/cookied-model-generator.groovy b/jobs/pipelines/cookied-model-generator.groovy
index 765d24e..4e5b328 100644
--- a/jobs/pipelines/cookied-model-generator.groovy
+++ b/jobs/pipelines/cookied-model-generator.groovy
@@ -43,7 +43,7 @@
               sh "${venv_cmd} && dos.py destroy ${ENV_NAME}"
             }
             if (env.ERASE_ENVIRONMENT_AFTER_BUILD.toBoolean()){
-              sh = "${venv_cmd} && dos.py erase ${ENV_NAME}"
+              sh "${venv_cmd} && dos.py erase ${ENV_NAME}"
             }
           }
         } //try