refactor: remove redundant err declarations (#32381)

modules/charset/charset_test.go

@@ -40,14 +40,12 @@ func TestMaybeRemoveBOM(t *testing.T) {
 
 func TestToUTF8(t *testing.T) {
 	resetDefaultCharsetsOrder()
-	var res string
-	var err error
 
 	// Note: golang compiler seems so behave differently depending on the current
 	// locale, so some conversions might behave differently. For that reason, we don't
 	// depend on particular conversions but in expected behaviors.
 
-	res, err = ToUTF8([]byte{0x41, 0x42, 0x43}, ConvertOpts{})
+	res, err := ToUTF8([]byte{0x41, 0x42, 0x43}, ConvertOpts{})
 	assert.NoError(t, err)
 	assert.Equal(t, "ABC", res)
 

modules/markup/markdown/goldmark.go

@@ -213,8 +213,7 @@ func (r *HTMLRenderer) renderIcon(w util.BufWriter, source []byte, node ast.Node
 		return ast.WalkContinue, nil
 	}
 
-	var err error
-	_, err = w.WriteString(fmt.Sprintf(`<i class="icon %s"></i>`, name))
+	_, err := w.WriteString(fmt.Sprintf(`<i class="icon %s"></i>`, name))
 	if err != nil {
 		return ast.WalkStop, err
 	}