Removed toArray() from collections (few tests are still failing).

#KT-3352 in progress

compiler/testData/codegen/box/builtinStubMethods/Collection.kt

@@ -3,8 +3,6 @@ class MyCollection<T>: Collection<T> {
     override fun isEmpty(): Boolean = true
     override fun contains(o: Any?): Boolean = false
     override fun iterator(): Iterator<T> = throw UnsupportedOperationException()
-    override fun toArray(): Array<Any?> = throw UnsupportedOperationException()
-    override fun <E> toArray(a: Array<out E>): Array<E> = throw UnsupportedOperationException()
     override fun containsAll(c: Collection<Any?>): Boolean = false
     override fun hashCode(): Int = 0
     override fun equals(other: Any?): Boolean = false

compiler/testData/codegen/box/builtinStubMethods/List.kt

@@ -3,8 +3,6 @@ class MyList<T>: List<T> {
     override fun isEmpty(): Boolean = true
     override fun contains(o: Any?): Boolean = false
     override fun iterator(): Iterator<T> = throw Error()
-    override fun toArray(): Array<Any?> = throw Error()
-    override fun <E> toArray(a: Array<out E>): Array<E> = throw Error()
     override fun containsAll(c: Collection<Any?>): Boolean = false
     override fun get(index: Int): T = throw IndexOutOfBoundsException()
     override fun indexOf(o: Any?): Int = -1

compiler/testData/codegen/box/builtinStubMethods/ListWithAllImplementations.kt

@@ -3,8 +3,6 @@ class MyList<T>(val v: T): List<T> {
     override fun isEmpty(): Boolean = true
     override fun contains(o: Any?): Boolean = false
     override fun iterator(): Iterator<T> = throw Error()
-    override fun toArray(): Array<Any?> = throw Error()
-    override fun <E> toArray(a: Array<out E>): Array<E> = throw Error()
     override fun containsAll(c: Collection<Any?>): Boolean = false
     override fun get(index: Int): T = v
     override fun indexOf(o: Any?): Int = -1

compiler/testData/codegen/box/builtinStubMethods/ListWithAllInheritedImplementations.kt

@@ -16,8 +16,6 @@ class MyList<T>(v: T): Super<T>(v), List<T> {
     override fun isEmpty(): Boolean = true
     override fun contains(o: Any?): Boolean = false
     override fun iterator(): Iterator<T> = throw Error()
-    override fun toArray(): Array<Any?> = throw Error()
-    override fun <E> toArray(a: Array<out E>): Array<E> = throw Error()
     override fun containsAll(c: Collection<Any?>): Boolean = false
     override fun get(index: Int): T = v
     override fun indexOf(o: Any?): Int = -1

compiler/testData/codegen/box/builtinStubMethods/SubstitutedList.kt

@@ -3,8 +3,6 @@ class MyList: List<String> {
     override fun isEmpty(): Boolean = true
     override fun contains(o: Any?): Boolean = false
     override fun iterator(): Iterator<String> = throw Error()
-    override fun toArray(): Array<Any?> = throw Error()
-    override fun <E> toArray(a: Array<out E>): Array<E> = throw Error()
     override fun containsAll(c: Collection<Any?>): Boolean = false
     override fun get(index: Int): String = throw IndexOutOfBoundsException()
     override fun indexOf(o: Any?): Int = -1

compiler/testData/codegen/boxWithStdlib/regressions/collections.kt

@@ -15,7 +15,6 @@ fun <T> testCollectionIterator(c: Collection<T>) {
         assertEquals(1, it.next())
     }
 }
-fun <T> testCollectionToArray(c: Collection<T>) = assertEquals(1, c.toArray()[0])
 fun <T> testCollectionContainsAll(c: Collection<T>) = assertTrue(c.containsAll(c))
 fun <T> testMutableCollectionAdd(c: MutableCollection<T>, t: T) {
     c.add(t)
@@ -60,7 +59,6 @@ fun testCollection() {
     testCollectionIsEmpty(arrayList<String>())
     testCollectionContains(arrayList(1))
     testCollectionIterator(arrayList(1))
-    testCollectionToArray(arrayList(1))
     testCollectionContainsAll(arrayList("a", "b"))
 
     testMutableCollectionAdd(arrayList(), "")