chore(internal/providers): simplify OpenVPN config building

internal/models/connection.go

@@ -1,7 +1,6 @@
 package models
 
 import (
-	"fmt"
 	"net"
 )
 
@@ -28,14 +27,6 @@ func (c *Connection) Equal(other Connection) bool {
 		c.PubKey == other.PubKey
 }
 
-func (c Connection) OpenVPNRemoteLine() (line string) {
-	return "remote " + c.IP.String() + " " + fmt.Sprint(c.Port)
-}
-
-func (c Connection) OpenVPNProtoLine() (line string) {
-	return "proto " + c.Protocol
-}
-
 // UpdateEmptyWith updates each field of the connection where the
 // value is not set using the value given as arguments.
 func (c *Connection) UpdateEmptyWith(ip net.IP, port uint16, protocol string) {