fix(firebase): remove deprecated Node versions from schema

Author: mainawycliffe

packages/firebase/src/generators/functions/schema.json

@@ -51,14 +51,6 @@
         "message": "What node runtime version would you like to use?",
         "type": "list",
         "items": [
-          {
-            "value": "14",
-            "label": "Node 14 (deprecated)"
-          },
-          {
-            "value": "16",
-            "label": "Node 16 (deprecated)"
-          },
           {
             "value": "18",
             "label": "Node 18"