chore: remove unused upvalue function (#823)

lua/lazyvim/util/init.lua

@@ -27,20 +27,6 @@ function M.fg(name)
   return fg and { fg = string.format("#%06x", fg) }
 end
 
-function M.get_upvalue(func, name)
-  local i = 1
-  while true do
-    local n, v = debug.getupvalue(func, i)
-    if not n then
-      break
-    end
-    if n == name then
-      return v
-    end
-    i = i + 1
-  end
-end
-
 ---@param fn fun()
 function M.on_very_lazy(fn)
   vim.api.nvim_create_autocmd("User", {