remove now-unused @IgnoreNative annotation

Author: ianbotsf

runtime/runtime-core/api/runtime-core.api

@@ -33,9 +33,6 @@ public final class aws/smithy/kotlin/runtime/ErrorMetadata$Companion {
 public abstract interface annotation class aws/smithy/kotlin/runtime/ExperimentalApi : java/lang/annotation/Annotation {
 }
 
-public abstract interface annotation class aws/smithy/kotlin/runtime/IgnoreNative : java/lang/annotation/Annotation {
-}
-
 public abstract interface annotation class aws/smithy/kotlin/runtime/InternalApi : java/lang/annotation/Annotation {
 }
 

runtime/runtime-core/common/src/aws/smithy/kotlin/runtime/Annotations.kt

@@ -58,9 +58,3 @@ public annotation class ExperimentalApi
  */
 @DslMarker
 public annotation class SdkDsl
-
-/**
- * Marks a test that should be ignored on Native platforms
- */
-@Target(AnnotationTarget.CLASS, AnnotationTarget.FUNCTION)
-public expect annotation class IgnoreNative()