♻️ Refactoring code. supoort knife4j doc

pigx-gateway/src/main/resources/application.yml

@@ -10,15 +10,6 @@ spring:
         server-addr: ${NACOS_HOST:pigx-register}:${NACOS_PORT:8848}
       config:
         server-addr: ${spring.cloud.nacos.discovery.server-addr}
-    gateway:
-      routes:
-        # 固定路由转发配置 无修改
-        - id: openapi
-          uri: lb://pigx-gateway
-          predicates:
-            - Path=/v3/api-docs/**
-          filters:
-            - RewritePath=/v3/api-docs/(?<path>.*), /$\{path}/$\{path}/v3/api-docs
   config:
     import:
       - optional:nacos:application-@profiles.active@.yml