ioutil: Remove deprecated functions where possible

cmd/micro/clean.go

@@ -4,7 +4,6 @@ import (
 	"bufio"
 	"encoding/gob"
 	"fmt"
-	"io/ioutil"
 	"os"
 	"path/filepath"
 	"sort"
@@ -91,7 +90,7 @@ func CleanConfig() {
 
 	// detect incorrectly formatted buffer/ files
 	buffersPath := filepath.Join(config.ConfigDir, "buffers")
-	files, err := ioutil.ReadDir(buffersPath)
+	files, err := os.ReadDir(buffersPath)
 	if err == nil {
 		var badFiles []string
 		var buffer buffer.SerializedBuffer

cmd/micro/micro.go

@@ -4,7 +4,6 @@ import (
 	"flag"
 	"fmt"
 	"io"
-	"io/ioutil"
 	"log"
 	"os"
 	"os/signal"
@@ -209,7 +208,7 @@ func LoadInput(args []string) []*buffer.Buffer {
 		// Option 2
 		// The input is not a terminal, so something is being piped in
 		// and we should read from stdin
-		input, err = ioutil.ReadAll(os.Stdin)
+		input, err = io.ReadAll(os.Stdin)
 		if err != nil {
 			screen.TermMessage("Error reading from stdin: ", err)
 			input = []byte{}