delete no use code

Author: yunheli

platform-api/src/main/java/com/flow/platform/api/service/GitServiceImpl.java

@@ -61,9 +61,6 @@ public class GitServiceImpl implements GitService {
 
     private final Map<GitSource, Class<? extends GitClientBuilder>> clientBuilderType = new HashMap<>(6);
 
-    @Autowired
-    private CacheManager cacheManager;
-
     @Autowired
     private Path workspace;