diff --git a/lib/io.go b/lib/io.go
index 6c25549..c0dd937 100644
--- a/lib/io.go
+++ b/lib/io.go
@@ -98,60 +98,3 @@ func determineIO(conf *cfg.Config, args []string) (io.Reader, string, error) {
 
 	return filehandle, pattern, nil
 }
-
-func _determineIO(conf *cfg.Config, args []string) ([]io.Reader, string, error) {
-	var filehandles []io.Reader
-
-	var pattern string
-
-	var haveio bool
-
-	stat, _ := os.Stdin.Stat()
-	if (stat.Mode() & os.ModeCharDevice) == 0 {
-		// we're reading from STDIN, which takes precedence over file args
-		filehandles = append(filehandles, os.Stdin)
-
-		if len(args) > 0 {
-			// ignore any args > 1
-			pattern = args[0]
-			conf.Pattern = args[0] // used for colorization by printData()
-		}
-
-		haveio = true
-	} else if len(args) > 0 {
-		// there were args left, take a look
-		if args[0] == "-" {
-			// in traditional unix programs a dash denotes STDIN (forced)
-			filehandles = append(filehandles, os.Stdin)
-			haveio = true
-		} else {
-			if _, err := os.Stat(args[0]); err != nil {
-				// first  one is  not a  file, consider  it as  regexp and
-				// shift arg list
-				pattern = args[0]
-				conf.Pattern = args[0] // used for colorization by printData()
-				args = args[1:]
-			}
-
-			if len(args) > 0 {
-				// consider any other args as files
-				for _, file := range args {
-					filehandle, err := os.OpenFile(file, os.O_RDONLY, RWRR)
-
-					if err != nil {
-						return nil, "", fmt.Errorf("failed to read input file %s: %w", file, err)
-					}
-
-					filehandles = append(filehandles, filehandle)
-					haveio = true
-				}
-			}
-		}
-	}
-
-	if !haveio {
-		return nil, "", errors.New("no file specified and nothing to read on stdin")
-	}
-
-	return filehandles, pattern, nil
-}