Revert "JavaCompletionUtil: use findMethodInSuperClassBySignatureInDerived" (e9f00a8) + test

It appears that findMethodInSuperClassBySignatureInDerived does not substitute recursively, at least in some cases.

java/java-tests/testData/codeInsight/completion/normal/NoUnnecessaryCastRawDfa.java

@@ -0,0 +1,10 @@
+import java.util.*;
+
+class Foo {
+    static class ListData extends ArrayList {}
+
+    void test() {
+        Set<ListData> list = new HashSet<>();
+        list.addA<caret>
+    }
+}