Remove rust-dataflow-url as it creates linking issue in Windows

Cargo.toml

@@ -96,9 +96,10 @@ name = "rust-ros2-dataflow"
 path = "examples/rust-ros2-dataflow/run.rs"
 required-features = ["ros2-examples"]
 
-[[example]]
-name = "rust-dataflow-url"
-path = "examples/rust-dataflow-url/run.rs"
+# Fix #192
+# [[example]]
+# name = "rust-dataflow-url"
+# path = "examples/rust-dataflow-url/run.rs"
 
 [[example]]
 name = "cxx-dataflow"