chore: clean up some sonar smells

Author: oliemansm

graphql-kickstart-spring-support/src/main/java/graphql/kickstart/spring/AbstractGraphQLController.java

@@ -49,7 +49,7 @@ public Object graphqlPOST(
       try {
         request = objectMapper.readGraphQLRequest(body);
       } catch (IOException e) {
-        return handleBodyParsingException(e, serverWebExchange);
+        return handleBodyParsingException(e);
       }
       if (request.getQuery() == null) {
         request.setQuery("");
@@ -106,8 +106,7 @@ protected abstract Object executeRequest(
       Map<String, Object> variables,
       ServerWebExchange serverWebExchange);
 
-  protected Object handleBodyParsingException(
-      Exception exception, ServerWebExchange serverWebExchange) {
+  protected Object handleBodyParsingException(Exception exception) {
     log.error("{} {}", INVALID_REQUEST_BODY_MESSAGE, exception.getMessage());
     return objectMapper.createResultFromExecutionResult(
         new ExecutionResultImpl(new GenericGraphQLError(INVALID_REQUEST_BODY_MESSAGE)));

graphql-spring-boot-autoconfigure/src/test/java/graphql/kickstart/autoconfigure/web/servlet/test/extendedscalars/ExtendedScalarAutoConfigurationTest.java

@@ -18,7 +18,7 @@
     classes = ExtendedScalarAutoConfigurationTest.ExtendedScalarsTestApplication.class)
 @TestPropertySource(properties = "graphql.extended-scalars=BigDecimal")
 @DisplayName("Testing extended scalars auto configuration")
-public class ExtendedScalarAutoConfigurationTest {
+class ExtendedScalarAutoConfigurationTest {
 
   @Autowired private ApplicationContext applicationContext;
 

graphql-spring-boot-autoconfigure/src/test/java/graphql/kickstart/autoconfigure/web/servlet/test/extendedscalars/ExtendedScalarsTest.java

@@ -18,7 +18,7 @@
 import org.springframework.core.env.StandardEnvironment;
 
 @DisplayName("Testing extended scalars configuration")
-public class ExtendedScalarsTest {
+class ExtendedScalarsTest {
 
   @Test
   @DisplayName(