Warnings clean up

Author: cowtowncoder

src/test/java/com/fasterxml/jackson/databind/deser/BeanDeserializerModifier4356Test.java

@@ -12,9 +12,6 @@
 import com.fasterxml.jackson.core.JsonProcessingException;
 
 import com.fasterxml.jackson.databind.*;
-import com.fasterxml.jackson.databind.deser.BeanDeserializerBuilder;
-import com.fasterxml.jackson.databind.deser.BeanDeserializerModifier;
-import com.fasterxml.jackson.databind.deser.SettableBeanProperty;
 import com.fasterxml.jackson.databind.module.SimpleModule;
 import com.fasterxml.jackson.databind.testutil.DatabindTestUtil;
 

src/test/java/com/fasterxml/jackson/databind/deser/CustomDeserializers4225NullCacheTest.java

@@ -20,8 +20,7 @@
 public class CustomDeserializers4225NullCacheTest extends DatabindTestUtil
 {
     static class CustomListDeserializer extends JsonDeserializer<List<String>> {
-
-        private static int getNullValueInvocationCount = 0;
+        static int getNullValueInvocationCount = 0;
 
         @Override
         public List<String> deserialize(JsonParser p, DeserializationContext ctxt) throws IOException, JacksonException {

src/test/java/com/fasterxml/jackson/databind/tofix/CustomObjectKeyDeserializer4680Test.java

@@ -14,10 +14,11 @@
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
-// [databind#4680] Custom key deserialiser registered for `Object.class` is ignored on nested JSON
+// [databind#4680] Custom key deserializer registered for `Object.class` is ignored on nested JSON
 public class CustomObjectKeyDeserializer4680Test
 {
 
+    @SuppressWarnings("unchecked")
     @JacksonTestFailureExpected
     @Test
     void testCustomKeyDeserializer()