Fixed completion for extension function after removing members for implicit receiver from scope.

idea/idea-completion/testData/basic/common/extensions/MemberExtensionWithoutExplicitReceiver.kt

@@ -0,0 +1,20 @@
+class B {
+    fun A.extFunInBForA() {}
+    fun B.extFunInBForB() {}
+
+}
+class A {
+    fun B.extFunInAForB() {}
+    fun A.extFunInAForA() {}
+}
+
+fun A.test() {
+    with(B()) {
+        <caret>
+    }
+}
+
+// EXIST: extFunInAForA
+// EXIST: extFunInBForA
+// EXIST: extFunInAForB
+// EXIST: extFunInBForB