remove some uses of try!

src/libstd/fs.rs

@@ -2065,7 +2065,7 @@ impl DirBuilder {
             Err(e) => return Err(e),
         }
         match path.parent() {
-            Some(p) => try!(self.create_dir_all(p)),
+            Some(p) => self.create_dir_all(p)?,
             None => return Err(io::Error::new(io::ErrorKind::Other, "failed to create whole tree")),
         }
         match self.inner.mkdir(path) {

src/libstd/sys/windows/stdio.rs

@@ -48,7 +48,7 @@ pub fn get(handle: c::DWORD) -> io::Result<Output> {
 }
 
 fn write(handle: c::DWORD, data: &[u8]) -> io::Result<usize> {
-    let handle = match try!(get(handle)) {
+    let handle = match get(handle)? {
         Output::Console(c) => c,
         Output::Pipe(p) => {
             let handle = Handle::new(p);
@@ -99,7 +99,7 @@ impl Stdin {
     }
 
     pub fn read(&self, buf: &mut [u8]) -> io::Result<usize> {
-        let handle = match try!(get(c::STD_INPUT_HANDLE)) {
+        let handle = match get(c::STD_INPUT_HANDLE)? {
             Output::Console(c) => c,
             Output::Pipe(p) => {
                 let handle = Handle::new(p);