Merge "RpcServer: Remove unused using." am: fee3b898c8

Original change: https://android-review.googlesource.com/c/platform/frameworks/native/+/1687406

Change-Id: I18bb0230f361b89d5c9f187fcf19d401b34dd6cb
diff --git a/libs/binder/RpcServer.cpp b/libs/binder/RpcServer.cpp
index 6dc4f95..9a0be92 100644
--- a/libs/binder/RpcServer.cpp
+++ b/libs/binder/RpcServer.cpp
@@ -30,8 +30,6 @@
 
 namespace android {
 
-using base::unique_fd;
-
 RpcServer::RpcServer() {}
 RpcServer::~RpcServer() {}