tests: Add removal test when there is no crc section

While the removal code when there is no crc section does not seem to
be impacted by the issues recently fixed, it does not hurt to have a
test for it.

pkg/hosts/hosts_test.go

@@ -282,6 +282,22 @@ func TestRemoveMultipleLines(t *testing.T) {
 	assert.Equal(t, hostsTemplate+eol()+crcSection(), string(content))
 }
 
+func TestRemoveMultipleNoCrcSection(t *testing.T) {
+	dir, err := os.MkdirTemp("", "hosts")
+	assert.NoError(t, err)
+	defer os.RemoveAll(dir)
+
+	hostsFile := filepath.Join(dir, "hosts")
+	assert.NoError(t, os.WriteFile(hostsFile, []byte("192.168.130.11   entry1 entry2"+eol()+"192.168.130.11   entry3 entry4"), 0600))
+	host := hosts(t, hostsFile)
+
+	assert.NoError(t, host.Remove([]string{"entry1", "entry2", "entry3", "entry4"}))
+
+	content, err := os.ReadFile(hostsFile)
+	assert.NoError(t, err)
+	assert.Equal(t, "", string(content))
+}
+
 func hosts(t *testing.T, hostsFile string) Hosts {
 	config, _ := libhosty.NewHostsFileConfig(hostsFile)
 	file, err := libhosty.InitWithConfig(config)