remove .roo/mcp.json from git tracking while keeping local file

.roo/mcp.json

@@ -1,19 +0,0 @@
-{
-  "mcpServers": {
-    "dbhub-postgres-npx": {
-      "command": "npx",
-      "args": [
-        "-y",
-        "@bytebase/dbhub",
-        "--transport",
-        "stdio",
-        "--dsn",
-        "mysql://kk_uruas2:5A2sspYYffkLmZ6W@8.152.199.43:3306/kk_uruas2?sslmode=disable"
-      ],
-      "alwaysAllow": [
-        "execute_sql",
-        "list_connectors"
-      ]
-    }
-  }
-}