chore: remove unused mappings

lua/config/mappings.lua

@@ -204,7 +204,6 @@ local mappings = {
 	l = {
 		name = 'LSP',
 		f = { '<cmd>lua vim.lsp.buf.format { async = true }<cr>', 'Format' },
-		e = { '<cmd>Lazy load null-ls.nvim<cr>', 'Enable null-ls' },
 		i = 'Lsp Info',
 		a = 'Code action',
 		j = 'Next diagnostic',
@@ -212,7 +211,6 @@ local mappings = {
 		r = 'Rename',
 		s = 'Signature Help',
 		q = 'Set LocList',
-		n = { '<cmd>Lazy load null-ls.nvim<cr>', 'Load Null Ls' },
 	},
 	['<TAB>'] = {
 		name = 'Tab',