Rollup merge of #22009 - japaric:no-mov, r=alexcrichton

 If you were still using `MaybeOwnedVector`, update your code to use `CowVec`.

[breaking-change]

---

We already removed `MaybeOwned` (the string equivalent) long time ago and with a much shorter deprecation period. It's time to let go.

Author: Manishearth

src/libgraphviz/lib.rs

@@ -278,7 +278,6 @@
 #![feature(collections)]
 #![feature(core)]
 #![feature(io)]
-#![feature(path)]
 
 use self::LabelText::*;
 
@@ -287,8 +286,6 @@ use std::old_io;
 use std::string::CowString;
 use std::vec::CowVec;
 
-pub mod maybe_owned_vec;
-
 /// The text for a graphviz label on a node or edge.
 pub enum LabelText<'a> {
     /// This kind of label preserves the text directly as is.

src/libgraphviz/maybe_owned_vec.rs

@@ -17,7 +17,6 @@ extern crate graphviz;
 
 extern crate "flate" as myflate;
 
-use graphviz::maybe_owned_vec::MaybeOwnedVector;
 use std::collections::{HashMap,HashSet};
 use std::cell::RefCell;
 use std::old_io::stdio::println;
@@ -35,7 +34,7 @@ use std::mem::size_of;
 static uni: &'static str = "Les Miséééééééérables";
 static yy: usize = 25us;
 
-static bob: Option<graphviz::maybe_owned_vec::MaybeOwnedVector<'static, isize>> = None;
+static bob: Option<std::vec::CowVec<'static, isize>> = None;
 
 // buglink test - see issue #1337.