Update linter and protoc issues

Signed-off-by: nyagamunene <[email protected]>

service.go

@@ -34,18 +34,17 @@ const (
 )
 
 var (
-	serialNumberLimit          = new(big.Int).Lsh(big.NewInt(1), 128)
-	errFailedReadingPrivateKey = errors.New("failed to read private key")
-	ErrNotFound                = errors.New("entity not found")
-	ErrConflict                = errors.New("entity already exists")
-	ErrCreateEntity            = errors.New("failed to create entity")
-	ErrViewEntity              = errors.New("view entity failed")
-	ErrGetToken                = errors.New("failed to get token")
-	ErrUpdateEntity            = errors.New("update entity failed")
-	ErrMalformedEntity         = errors.New("malformed entity specification")
-	ErrRootCANotFound          = errors.New("root CA not found")
-	ErrCertExpired             = errors.New("certificate expired before renewal")
-	ErrCertRevoked             = errors.New("certificate has been revoked and cannot be renewed")
+	serialNumberLimit  = new(big.Int).Lsh(big.NewInt(1), 128)
+	ErrNotFound        = errors.New("entity not found")
+	ErrConflict        = errors.New("entity already exists")
+	ErrCreateEntity    = errors.New("failed to create entity")
+	ErrViewEntity      = errors.New("view entity failed")
+	ErrGetToken        = errors.New("failed to get token")
+	ErrUpdateEntity    = errors.New("update entity failed")
+	ErrMalformedEntity = errors.New("malformed entity specification")
+	ErrRootCANotFound  = errors.New("root CA not found")
+	ErrCertExpired     = errors.New("certificate expired before renewal")
+	ErrCertRevoked     = errors.New("certificate has been revoked and cannot be renewed")
 )
 
 type service struct {