Remove 'use' line that's confusing pp-exact during use/import transition.

Author: graydon

src/test/run-pass/shebang.rs

@@ -1,6 +1,4 @@
 #!/usr/bin/env rustx
 // pp-exact
 
-use io::println;
-
-fn main() { io::println(~"Hello World"); }
+fn main() { io::println("Hello World"); }