message: make perf reg script more general
diff: @@ -11,7 +11,6 @@ temp_lib_dir <- dir_create()
  versions <- list(
  master = list(repo = "duckdb/duckdb", branch = "master"),
  - cpp11 = list(repo = "cynkra/duckdb", branch = "cpp11-4"),
  release = list(repo = "duckdb/duckdb", ref = "v0.3.1")
  )
  