small REPL fixes

compiler/fn.v

@@ -417,7 +417,7 @@ fn (p mut Parser) check_unused_variables() {
 		if var.name == '' {
 			break
 		}
-		if !var.is_used && !var.is_arg && !p.pref.translated && var.name != '_' {
+		if !var.is_used && !p.pref.is_repl && !var.is_arg && !p.pref.translated && var.name != '_' {
 			p.scanner.line_nr = var.line_nr - 1
 			p.error('`$var.name` declared and not used')
 		}

compiler/main.v

@@ -961,7 +961,6 @@ fn new_v(args[]string) *V {
 fn run_repl() []string {
 	println('V $Version')
 	println('Use Ctrl-C or `exit` to exit')
-	println('For now you have to use println() to print values, this will be fixed soon\n')
 	file := TmpPath + '/vrepl.v'
 	temp_file := TmpPath + '/vrepl_temp.v'
 	mut lines := []string

compiler/scanner.v

@@ -165,8 +165,7 @@ fn (s mut Scanner) cao_change(operator string) {
 	s.text = s.text.substr(0, s.pos - operator.len) + ' = ' + s.get_var_name(s.pos - operator.len) + ' ' + operator + ' ' + s.text.substr(s.pos + 1, s.text.len)
 }
 
-fn (s mut Scanner) scan() 
-ScanRes {
+fn (s mut Scanner) scan() ScanRes {
 	// if s.file_path == 'd.v' {
 	// println('\nscan()')
 	// }