Drop unused npm deps

Author: tk-o

packages/ensdb-sdk/package.json

@@ -61,7 +61,6 @@
     "@ensnode/ensnode-sdk": "workspace:",
     "@ensnode/shared-configs": "workspace:*",
     "drizzle-orm": "catalog:",
-    "pg-connection-string": "catalog:",
     "ponder": "catalog:",
     "tsup": "catalog:",
     "typescript": "catalog:",