vec: remove BaseIter implementation

I removed the `static-method-test.rs` test because it was heavily based
on `BaseIter` and there are plenty of other more complex uses of static
methods anyway.

src/libstd/unstable/sync.rs

@@ -237,7 +237,7 @@ mod tests {
                 }
             };
 
-            for futures.each |f| { f.recv() }
+            for futures.iter().advance |f| { f.recv() }
 
             do total.with |total| {
                 assert!(**total == num_tasks * count)