[K/N] Revert language version override for uikit sample

^KT-62262

kotlin-native/backend.native/tests/samples/uikit/build.gradle.kts

@@ -101,7 +101,3 @@ val packForXCode = if (sdkName == null || targetBuildDir == null || executablePa
         }
     }
 }
-
-tasks.withType<org.jetbrains.kotlin.gradle.tasks.KotlinNativeCompile>().configureEach {
-    compilerOptions.languageVersion.set(org.jetbrains.kotlin.gradle.dsl.KotlinVersion.KOTLIN_1_9)
-}