Remove redundant dependencies in sgx_urts
diff --git a/sgx_urts/Cargo.toml b/sgx_urts/Cargo.toml
index 8f94a64..f240098 100644
--- a/sgx_urts/Cargo.toml
+++ b/sgx_urts/Cargo.toml
@@ -19,5 +19,4 @@
 
 [dependencies]
 sgx_types = { path = "../sgx_types" }
-sgx_uspfs = { path = "../sgx_fs/uspfs" }
 libc = "0.2"