Drop deprecated Delegates.lazy and blockingLazy and ObservableProperty constructor-like function

libraries/stdlib/test/properties/delegation/lazy/LazyValuesTest.kt

@@ -91,79 +91,9 @@ class UnsafeNullableLazyValTest {
     }
 }
 
-class UnsafeLazyValDeprecatedTest {
-    var result = 0
-    val a by Delegates.lazy {
-        ++result
-    }
-
-    @test fun doTest() {
-        a
-        assertTrue(a == 1, "fail: initializer should be invoked only once")
-    }
-}
-
-class BlockingLazyValDeprecatedTest {
-    var result = 0
-    val a by Delegates.blockingLazy {
-        ++result
-    }
-
-    @test fun doTest() {
-        a
-        assertTrue(a == 1, "fail: initializer should be invoked only once")
-    }
-}
-
-class UnsafeNullableLazyValDeprecatedTest  {
-    var resultA = 0
-    var resultB = 0
-
-    val a: Int? by Delegates.lazy { resultA++; null}
-    val b by Delegates.lazy { foo() }
-
-    @test fun doTest() {
-        a
-        b
-
-        assertTrue(a == null, "fail: a should be null")
-        assertTrue(b == null, "fail: b should be null")
-        assertTrue(resultA == 1, "fail: initializer for a should be invoked only once")
-        assertTrue(resultB == 1, "fail: initializer for b should be invoked only once")
-    }
-
-    fun foo(): String? {
-        resultB++
-        return null
-    }
-}
-
-class BlockingNullableLazyValDeprecatedTest {
-    var resultA = 0
-    var resultB = 0
-
-    val a: Int? by Delegates.blockingLazy { resultA++; null}
-    val b by Delegates.blockingLazy { foo() }
-
-    @test fun doTest() {
-        a
-        b
-
-        assertTrue(a == null, "fail: a should be null")
-        assertTrue(b == null, "fail: a should be null")
-        assertTrue(resultA == 1, "fail: initializer for a should be invoked only once")
-        assertTrue(resultB == 1, "fail: initializer for b should be invoked only once")
-    }
-
-    fun foo(): String? {
-        resultB++
-        return null
-    }
-}
-
 class IdentityEqualsIsUsedToUnescapeLazyValTest {
     var equalsCalled = 0
-    val a by lazy { ClassWithCustomEquality { equalsCalled++ } }
+    private val a by lazy { ClassWithCustomEquality { equalsCalled++ } }
 
     @test fun doTest() {
         a