Remove undefined variable

Remove undefined variable `extra_tgt`

Change-Id: Ie437ceaa445b1564437fb1150d490e38cfb45230
Related-Prod: PROD-29483
Related-Prod: PROD-30770
diff --git a/upgrade-mcp-release.groovy b/upgrade-mcp-release.groovy
index bff2589..902e466 100644
--- a/upgrade-mcp-release.groovy
+++ b/upgrade-mcp-release.groovy
@@ -485,7 +485,7 @@
                 salt.enforceState(venvPepper, "I@salt:minion", 'salt.minion.cert', true)
 
                 // run `salt.minion` to refresh all minion configs (for example _keystone.conf)
-                salt.enforceState([saltId: venvPepper, target: "I@salt:minion ${extra_tgt}", state: ['salt.minion'], read_timeout: 60, retries: 2])
+                salt.enforceState([saltId: venvPepper, target: "I@salt:minion", state: ['salt.minion'], read_timeout: 60, retries: 2])
                 // Retry needed only for rare race-condition in user appearance
                 common.infoMsg('Perform: updating users and keys')
                 salt.enforceState(venvPepper, "I@linux:system", 'linux.system.user', true)