ZITIS-845 remove unusued code

Author: HighKo

kotlin-jira-client/kotlin-jira-client-test-base/src/main/kotlin/com/linkedplanet/kotlinjiraclient/util/AssertionExtensions.kt

@@ -20,17 +20,9 @@
 package com.linkedplanet.kotlinjiraclient.util
 
 import arrow.core.Either
-import com.linkedplanet.kotlinhttpclient.error.DomainError
 import com.linkedplanet.kotlinjiraclient.api.error.JiraClientError
 import org.junit.Assert.fail
 
-internal fun <R> Either<DomainError, R?>.rightAsserted(): R {
-    this.mapLeft {
-        fail("Unexpected DomainError: ${it.error} - ${it.message}")
-    }
-    return this.orNull()!!
-}
-
 
 internal fun <R> Either<JiraClientError, R?>.rightAssertedJiraClientError(): R {
     this.mapLeft {