chore(lint): fix issues

- sources/env: remove unused `envToInt`
- fix `ireturn` error for `newCipherDESCBCBlock`

.golangci.yml

@@ -29,6 +29,10 @@ issues:
     - text: "returns interface \\(github\\.com\\/vishvananda\\/netlink\\.Link\\)"
       linters:
         - ireturn
+    - path: "internal\\/openvpn\\/pkcs8\\/descbc\\.go"
+      text: "newCipherDESCBCBlock returns interface \\(github\\.com\\/youmark\\/pkcs8\\.Cipher\\)"
+      linters:
+        - ireturn
 
 linters:
   enable:

internal/configuration/sources/env/helpers.go

@@ -29,14 +29,6 @@ func envToCSV(envKey string) (values []string) {
 	return lowerAndSplit(csv)
 }
 
-func envToInt(envKey string) (n int, err error) {
-	s := getCleanedEnv(envKey)
-	if s == "" {
-		return 0, nil
-	}
-	return strconv.Atoi(s)
-}
-
 func envToFloat64(envKey string) (f float64, err error) {
 	s := getCleanedEnv(envKey)
 	if s == "" {

internal/openvpn/pkcs8/descbc.go

@@ -14,7 +14,7 @@ func init() { //nolint:gochecknoinits
 	pkcs8lib.RegisterCipher(oidDESCBC, newCipherDESCBCBlock)
 }
 
-func newCipherDESCBCBlock() pkcs8lib.Cipher { //nolint:ireturn
+func newCipherDESCBCBlock() pkcs8lib.Cipher {
 	return cipherDESCBC{}
 }