Remove exceptions from lambda security configuration

Fixes: gh-7128

samples/boot/oauth2resourceserver-static/src/main/java/sample/OAuth2ResourceServerSecurityConfiguration.java

@@ -53,7 +53,7 @@ public class OAuth2ResourceServerSecurityConfiguration extends WebSecurityConfig
 	}
 
 	@Bean
-	JwtDecoder jwtDecoder() throws Exception {
+	JwtDecoder jwtDecoder() {
 		return NimbusJwtDecoder.withPublicKey(this.key).build();
 	}
 }