Minor staticcheck fixes

Don't need the exception as my PR to improve it got merged.

Author: arp242

cmd/tomlv/main.go

@@ -53,7 +53,7 @@ func main() {
 			log.Fatalf("Error in '%s': %s", f, err)
 		}
 		if flagTime {
-			fmt.Printf("%f\n", time.Now().Sub(start).Seconds())
+			fmt.Printf("%f\n", time.Since(start).Seconds())
 		}
 		if flagTypes {
 			printTypes(md)

decode_test.go

@@ -1144,7 +1144,7 @@ func BenchmarkKey(b *testing.B) {
 	k := Key{"cargo-credential-macos-keychain", "version"}
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		k.String()
+		_ = k.String()
 	}
 }
 

parse.go

@@ -50,7 +50,6 @@ func parse(data string) (p *parser, err error) {
 	// it anyway.
 	if strings.HasPrefix(data, "\xff\xfe") || strings.HasPrefix(data, "\xfe\xff") { // UTF-16
 		data = data[2:]
-		//lint:ignore S1017 https://github.com/dominikh/go-tools/issues/1447
 	} else if strings.HasPrefix(data, "\xef\xbb\xbf") { // UTF-8
 		data = data[3:]
 	}