use the right test imports

Author: ianbotsf

runtime/runtime-core/common/test/aws/smithy/kotlin/runtime/collections/CaseInsensitiveMapTest.kt

@@ -4,9 +4,9 @@
  */
 package aws.smithy.kotlin.runtime.collections
 
-import org.junit.jupiter.api.Assertions.assertFalse
 import kotlin.test.Test
 import kotlin.test.assertEquals
+import kotlin.test.assertFalse
 import kotlin.test.assertTrue
 
 class CaseInsensitiveMapTest {

runtime/runtime-core/common/test/aws/smithy/kotlin/runtime/collections/CaseInsensitiveMutableStringSetTest.kt

@@ -1,10 +1,6 @@
 package aws.smithy.kotlin.runtime.collections
 
-import org.junit.jupiter.api.Test
-import kotlin.test.assertEquals
-import kotlin.test.assertFalse
-import kotlin.test.assertNotEquals
-import kotlin.test.assertTrue
+import kotlin.test.*
 
 private val input = setOf("APPLE", "banana", "cHeRrY")
 private val variations = (input + input.map { it.lowercase() } + input.map { it.uppercase() })