Java: Don't delete class cast when deleting unused variable (IDEA-181346)

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/removeUnusedVariable/afterCastAsSubexpr.java

@@ -0,0 +1,10 @@
+// "Remove variable 'c'" "true"
+class C {
+  String s;
+
+  void foo(Object o) {
+    if (o instanceof C) {
+        String t = ((C) o).s;
+    }
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/removeUnusedVariable/afterCastAsSubexpr1.java

@@ -0,0 +1,8 @@
+// "Remove variable 'n'" "true"
+class C {
+  void foo(Object o) {
+    if (o instanceof Integer) {
+        int i = (Integer) o + 1;
+    }
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/removeUnusedVariable/beforeCastAsSubexpr.java

@@ -0,0 +1,11 @@
+// "Remove variable 'c'" "true"
+class C {
+  String s;
+
+  void foo(Object o) {
+    if (o instanceof C) {
+      C c<caret>;
+      String t = (c = (C) o).s;
+    }
+  }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/removeUnusedVariable/beforeCastAsSubexpr1.java

@@ -0,0 +1,9 @@
+// "Remove variable 'n'" "true"
+class C {
+  void foo(Object o) {
+    if (o instanceof Integer) {
+      Integer n<caret>;
+      int i = (n = (Integer) o) + 1;
+    }
+  }
+}