Remove redundant declarations of JSpecify's @⁠NonNull annotation

Closes gh-35341

spring-beans/src/main/java/org/springframework/beans/ExtendedBeanInfoFactory.java

@@ -20,8 +20,6 @@ import java.beans.BeanInfo;
 import java.beans.IntrospectionException;
 import java.lang.reflect.Method;
 
-import org.jspecify.annotations.NonNull;
-
 import org.springframework.core.Ordered;
 
 /**
@@ -44,7 +42,7 @@ import org.springframework.core.Ordered;
 public class ExtendedBeanInfoFactory extends StandardBeanInfoFactory {
 
 	@Override
-	public @NonNull BeanInfo getBeanInfo(Class<?> beanClass) throws IntrospectionException {
+	public BeanInfo getBeanInfo(Class<?> beanClass) throws IntrospectionException {
 		BeanInfo beanInfo = super.getBeanInfo(beanClass);
 		return (supports(beanClass) ? new ExtendedBeanInfo(beanInfo) : beanInfo);
 	}

spring-core/src/main/java/org/springframework/core/annotation/TypeMappedAnnotations.java

@@ -29,7 +29,6 @@ import java.util.function.Predicate;
 import java.util.stream.Stream;
 import java.util.stream.StreamSupport;
 
-import org.jspecify.annotations.NonNull;
 import org.jspecify.annotations.Nullable;
 
 /**
@@ -483,7 +482,7 @@ final class TypeMappedAnnotations implements MergedAnnotations {
 		}
 
 		@Override
-		public @NonNull List<Aggregate> finish(@Nullable List<Aggregate> processResult) {
+		public List<Aggregate> finish(@Nullable List<Aggregate> processResult) {
 			return this.aggregates;
 		}
 	}

spring-core/src/test/java/org/springframework/core/annotation/AnnotationsScannerTests.java

@@ -29,7 +29,6 @@ import java.util.Objects;
 import java.util.function.Predicate;
 import java.util.stream.Stream;
 
-import org.jspecify.annotations.NonNull;
 import org.jspecify.annotations.Nullable;
 import org.junit.jupiter.api.Test;
 
@@ -470,13 +469,13 @@ class AnnotationsScannerTests {
 				new AnnotationsProcessor<Object, String>() {
 
 					@Override
-					public @NonNull String doWithAggregate(Object context, int aggregateIndex) {
+					public String doWithAggregate(Object context, int aggregateIndex) {
 						return "";
 					}
 
 					@Override
-					public @NonNull String doWithAnnotations(Object context, int aggregateIndex,
+					public String doWithAnnotations(Object context, int aggregateIndex,
-							@Nullable Object source, @Nullable Annotation @Nullable [] annotations) {
+							@Nullable Object source, @Nullable Annotation[] annotations) {
 						throw new IllegalStateException("Should not call");
 					}
 
@@ -502,13 +501,13 @@ class AnnotationsScannerTests {
 				new AnnotationsProcessor<Object, String>() {
 
 					@Override
-					public @NonNull String doWithAnnotations(Object context, int aggregateIndex,
+					public String doWithAnnotations(Object context, int aggregateIndex,
-							@Nullable Object source, @Nullable Annotation @Nullable [] annotations) {
+							@Nullable Object source, @Nullable Annotation[] annotations) {
 						return "K";
 					}
 
 					@Override
-					public @NonNull String finish(@Nullable String result) {
+					public String finish(@Nullable String result) {
 						return "O" + result;
 					}