Move #2461 test from "tofix" to its proper place

src/test/java/com/fasterxml/jackson/databind/tofix/UnwrappedCaching2461Test.java → src/test/java/com/fasterxml/jackson/databind/struct/UnwrappedCaching2461Test.java

@@ -1,12 +1,11 @@
-package com.fasterxml.jackson.databind.tofix;
+package com.fasterxml.jackson.databind.struct;
 
 import org.junit.jupiter.api.Test;
 
 import com.fasterxml.jackson.annotation.JsonUnwrapped;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.testutil.DatabindTestUtil;
-import com.fasterxml.jackson.databind.testutil.failure.JacksonTestFailureExpected;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;