Optimize Imports: do not keep imports of unimportable entities

idea/testData/editor/optimizeImports/ClassMemberImported/ClassMemberImported.after.kt

@@ -0,0 +1,10 @@
+package test
+
+import dependency.*
+
+fun f(a: A, t: T) {
+    a.f()
+    a.p
+    t.f
+    t.p
+}

idea/testData/editor/optimizeImports/ClassMemberImported/ClassMemberImported.dependency.kt

@@ -0,0 +1,15 @@
+package dependency
+
+class A {
+    fun f() {
+    }
+
+    val p: Int = 1
+}
+
+trait T {
+    fun f() {
+    }
+
+    val p: Int = 1
+}

idea/testData/editor/optimizeImports/ClassMemberImported/ClassMemberImported.kt

@@ -0,0 +1,14 @@
+package test
+
+import dependency.*
+import dependency.A.f
+import dependency.A.p
+import dependency.T.f
+import dependency.T.p
+
+fun f(a: A, t: T) {
+    a.f()
+    a.p
+    t.f
+    t.p
+}