RemoveRedundantQualifierNameInspection: fix case with non-static java functions

idea/testData/multiFileLocalInspections/redundantQualifierName/javaStatic2/after/my/Reproducer.java

@@ -0,0 +1,11 @@
+package my;
+
+public class Reproducer {
+    public static Reproducer test() {
+        return new Reproducer();
+    }
+
+    public int number() {
+        return 42;
+    }
+}