build: Use spring-web instead of spring-webflux in spring-ai-retry

The dependency on spring-webflux was unnecessary, there was no code
inside spring-ai-retry that made use of it.

Also remove 'optional' from slf4j-api dependency (it's not optional,
if you don't have it on classpath, RetryUtils will fail to load).

Fixes spring-projects#3307

Signed-off-by: Piotr Kubowicz <piotr.kubowicz@gmail.com>

Author: pkubowicz

spring-ai-retry/pom.xml

@@ -49,13 +49,12 @@
 
 		<dependency>
 			<groupId>org.springframework</groupId>
-			<artifactId>spring-webflux</artifactId>
+			<artifactId>spring-web</artifactId>
 		</dependency>
 
 		<dependency>
 			<groupId>org.slf4j</groupId>
 			<artifactId>slf4j-api</artifactId>
-			<optional>true</optional>
 		</dependency>
 
 		<!-- test dependencies -->
@@ -66,4 +65,4 @@
 		</dependency>
 
 	</dependencies>
-</project>
+</project>