refactor(model-server): use the default leeway for JWT verification, which is as well 0

See https://github.com/auth0/java-jwt/blob/fb6d00ad9773c6e7624c518feb2d06ed191287fa/lib/src/main/java/com/auth0/jwt/JWTVerifier.java#L71

Author: Oleksandr Dzhychko

authorization/src/main/kotlin/org/modelix/authorization/AuthorizationConfig.kt

@@ -221,5 +221,4 @@ private fun getBooleanFromEnv(name: String): Boolean? {
 
 internal fun getVerifierForSpecificAlgorithm(algorithm: Algorithm): JWTVerifier =
     JWT.require(algorithm)
-        .acceptLeeway(0L)
         .build()