[renovate]Remove golang constraint

The shared global config already has a golang 1.20 constraint

Author: gibizer

renovate.json

@@ -2,9 +2,6 @@
   "extends": [
     "github>openstack-k8s-operators/renovate-config:default.json5"
   ],
-  "constraints": {
-    "go": "1.19"
-  },
   "baseBranches": ["main"],
   "useBaseBranchConfig": "merge",
   "packageRules": [