Fix API break in Fake classes must be named using Fake and the interface it fakes

It seems that the workaround is not necessary anymore.

tests/konsist/src/test/kotlin/io/element/android/tests/konsist/KonsistClassNameTest.kt

@@ -91,11 +91,7 @@ class KonsistClassNameTest {
                     .replace("Fake", "")
                 val result = (it.name.startsWith("Fake") || it.name.startsWith("FakeRust")) &&
                     it.parents().any { parent ->
-                        // Workaround to get the parent name. For instance:
-                        // parent.name used to return `UserListPresenter.Factory` but is now returning `Factory`.
-                        // So we need to retrieve the name of the parent class differently.
-                        val packageName = parent.packagee!!.name
-                        val parentName = parent.fullyQualifiedName!!.substringAfter("$packageName.").replace(".", "")
+                        val parentName = parent.name.replace(".", "")
                         parentName == interfaceName
                     }
                 if (!result && it.name in failingCasesList) {