Revert "KT-31400 Add a contract for isArrayOf"

This reverts commit 71c4011.

Author: fzhinkin

core/reflection.jvm/src/kotlin/reflect/jvm/internal/calls/AnnotationConstructorCaller.kt

@@ -72,7 +72,7 @@ private fun Any?.transformKotlinToJvm(expectedType: Class<*>): Any? {
         is KClass<*> -> this.java
         is Array<*> -> when {
             this.isArrayOf<Class<*>>() -> return null
-            this.isArrayOf<KClass<*>>() -> this.map(KClass<*>::java).toTypedArray()
+            this.isArrayOf<KClass<*>>() -> (this as Array<KClass<*>>).map(KClass<*>::java).toTypedArray()
             else -> this
         }
         else -> this

libraries/stdlib/jvm/runtime/kotlin/jvm/JvmClassMapping.kt

@@ -7,7 +7,6 @@
 
 package kotlin.jvm
 
-import kotlin.contracts.contract
 import kotlin.internal.InlineOnly
 import kotlin.jvm.internal.ClassBasedDeclarationContainer
 import kotlin.jvm.internal.Reflection
@@ -96,15 +95,11 @@ public inline val <T : Any> KClass<T>.javaClass: Class<KClass<T>>
     get() = (this as java.lang.Object).getClass() as Class<KClass<T>>
 
 /**
- * Checks if the array can contain an element of type [T].
+ * Checks if array can contain element of type [T].
  */
 @Suppress("REIFIED_TYPE_PARAMETER_NO_INLINE")
-public fun <reified T : Any> Array<*>.isArrayOf(): Boolean {
-    contract {
-        returns(true) implies (this@isArrayOf is Array<T>)
-    }
-    return T::class.java.isAssignableFrom(this::class.java.componentType)
-}
+public fun <reified T : Any> Array<*>.isArrayOf(): Boolean =
+    T::class.java.isAssignableFrom(this::class.java.componentType)
 
 /**
  * Returns a [KClass] instance corresponding to the annotation type of this annotation.

libraries/stdlib/jvm/test/collections/CollectionJVMTest.kt

@@ -124,17 +124,6 @@ class CollectionJVMTest {
         }
     }
 
-    @Test fun isArrayOf() {
-        val arr: Array<*> = arrayOf("smart")
-
-        if (arr.isArrayOf<String>()) {
-            val str: String = arr[0]
-            assertEquals("smart", str)
-        } else {
-            fail("Should not be reachable")
-        }
-    }
-
     @Test fun toSortedSet() {
         val data = listOf("foo", "Foo", "bar")
         val set1 = data.toSortedSet()