Add cmp.config.disable for opt-out default setting

README.md

@@ -84,6 +84,7 @@ lua <<EOF
       ['<C-f>'] = cmp.mapping.scroll_docs(4),
       ['<C-Space>'] = cmp.mapping.complete(),
       ['<C-e>'] = cmp.mapping.close(),
+      ['<C-y>'] = cmp.config.disable, -- If you want to remove the default `<C-y>` mapping, You can specify `cmp.config.disable` value.
       ['<CR>'] = cmp.mapping.confirm({ select = true }),
     },
     sources = cmp.config.sources({