Implement enabled=false configuration

lua/cmp/utils/check.lua

@@ -1,18 +0,0 @@
-local check = {}
-
-check.ok = function()
-  local ng = false
-  ng = ng or vim.api.nvim_buf_get_option(0, 'buftype') == 'prompt'
-  ng = ng or string.sub(vim.api.nvim_get_mode().mode, 1, 1) ~= 'i'
-  return not ng
-end
-
-check.wrap = function(callback)
-  return function(...)
-    if check.ok() then
-      callback(...)
-    end
-  end
-end
-
-return check