Removes breaking and unneeded config annotation

src/main/kotlin/net/halfbinary/tmnt/config/WebConfig.kt

@@ -1,14 +1,20 @@
 package net.halfbinary.tmnt.config
 
+import org.springframework.context.annotation.Bean
 import org.springframework.context.annotation.Configuration
 import org.springframework.web.servlet.config.annotation.CorsRegistry
-import org.springframework.web.servlet.config.annotation.EnableWebMvc
 import org.springframework.web.servlet.config.annotation.WebMvcConfigurer
 
-@Configuration
-@EnableWebMvc
-class WebConfig : WebMvcConfigurer {
-    override fun addCorsMappings(registry: CorsRegistry) {
-        registry.addMapping("/**")
+@Configuration(proxyBeanMethods = false)
+class MyCorsConfiguration {
+
+    @Bean
+    fun corsConfigurer(): WebMvcConfigurer {
+        return object : WebMvcConfigurer {
+            override fun addCorsMappings(registry: CorsRegistry) {
+                registry.addMapping("/**")
+            }
+        }
     }
+
 }