Drop the redundant private_token GET parameter

Quoting from the GitLab API: "You can use a personal access token to authenticate with the API by passing it in either the private_token parameter or the Private-Token header.".

By using it as GET parameter we expose our tokens to sniffing!

app/src/main/java/com/commit451/gitlab/api/AuthenticationRequestInterceptor.kt

@@ -25,10 +25,6 @@ class AuthenticationRequestInterceptor(private val account: Account) : Intercept
         if (isSameServer(url.toString(), serverUrl)) {
             val privateToken = account.privateToken
             privateToken?.let {
-                url = url.newBuilder()
-                        .addQueryParameter(PRIVATE_TOKEN_GET_PARAMETER, it)
-                        .build()
-
                 request = request.newBuilder()
                         .header(PRIVATE_TOKEN_HEADER_FIELD, it)
                         .url(url)