Delete unused code

spring-core/src/test/java/org/springframework/core/codec/StringDecoderTests.java

@@ -25,8 +25,6 @@ import java.util.Collections;
 import java.util.List;
 
 import org.junit.jupiter.api.Test;
-import org.reactivestreams.Subscription;
-import reactor.core.publisher.BaseSubscriber;
 import reactor.core.publisher.Flux;
 import reactor.test.StepVerifier;
 
@@ -268,13 +266,4 @@ class StringDecoderTests extends AbstractDecoderTests<StringDecoder> {
 		return buffer;
 	}
 
-
-	private static class SingleRequestSubscriber extends BaseSubscriber<String> {
-
-		@Override
-		protected void hookOnSubscribe(Subscription subscription) {
-			subscription.request(1);
-		}
-	}
-
 }

spring-expression/src/main/java/org/springframework/expression/spel/ast/FunctionReference.java

@@ -199,8 +199,7 @@ public class FunctionReference extends SpelNodeImpl {
 			varArgPosition = declaredParamCount - 1;
 		}
 		TypeConverter converter = state.getEvaluationContext().getTypeConverter();
-		boolean conversionOccurred = ReflectionHelper.convertAllMethodHandleArguments(converter,
-				functionArgs, methodHandle, varArgPosition);
+		ReflectionHelper.convertAllMethodHandleArguments(converter, functionArgs, methodHandle, varArgPosition);
 
 		if (isSuspectedVarargs && declaredParamCount == 1) {
 			//we only repack the varargs if it is the ONLY argument