DOC: Remove 'extern crate' from all examples

Prefer Rust 2018 syntax now, no extern crate needed.

Author: bluss

src/doc/ndarray_for_numpy_users/coord_transform.rs

@@ -49,8 +49,6 @@
 //! This is a direct translation to `ndarray`:
 //!
 //! ```
-//! extern crate ndarray;
-//!
 //! use ndarray::prelude::*;
 //!
 //! fn main() {
@@ -96,8 +94,6 @@
 //! this:
 //!
 //! ```
-//! extern crate ndarray;
-//!
 //! use ndarray::prelude::*;
 //!
 //! fn main() {

src/doc/ndarray_for_numpy_users/mod.rs

@@ -177,8 +177,6 @@
 //! and `ndarray` like this:
 //!
 //! ```
-//! extern crate ndarray;
-//!
 //! use ndarray::prelude::*;
 //! #
 //! # fn main() {}

src/doc/ndarray_for_numpy_users/rk_step.rs

@@ -71,8 +71,6 @@
 //! A direct translation to `ndarray` looks like this:
 //!
 //! ```
-//! extern crate ndarray;
-//!
 //! use ndarray::prelude::*;
 //!
 //! fn rk_step<F>(
@@ -129,8 +127,6 @@
 //!   some places, but that's not demonstrated in the example below.
 //!
 //! ```
-//! extern crate ndarray;
-//!
 //! use ndarray::prelude::*;
 //!
 //! fn rk_step<F>(

src/doc/ndarray_for_numpy_users/simple_math.rs

@@ -51,8 +51,6 @@
 //! <td>
 //!
 //! ```
-//! extern crate ndarray;
-//!
 //! use ndarray::prelude::*;
 //!
 //! # fn main() {

src/parallel/mod.rs

@@ -39,8 +39,6 @@
 //! Compute the exponential of each element in an array, parallelized.
 //!
 //! ```
-//! extern crate ndarray;
-//!
 //! use ndarray::Array2;
 //! use ndarray::parallel::prelude::*;
 //!
@@ -61,8 +59,6 @@
 //! Use the parallel `.axis_iter()` to compute the sum of each row.
 //!
 //! ```
-//! extern crate ndarray;
-//!
 //! use ndarray::Array;
 //! use ndarray::Axis;
 //! use ndarray::parallel::prelude::*;
@@ -84,8 +80,6 @@
 //! Use the parallel `.axis_chunks_iter()` to process your data in chunks.
 //!
 //! ```
-//! extern crate ndarray;
-//!
 //! use ndarray::Array;
 //! use ndarray::Axis;
 //! use ndarray::parallel::prelude::*;
@@ -107,8 +101,6 @@
 //! Use zip for lock step function application across several arrays
 //!
 //! ```
-//! extern crate ndarray;
-//!
 //! use ndarray::Array3;
 //! use ndarray::Zip;
 //!

src/parallel/zipmacro.rs

@@ -34,8 +34,6 @@
 /// ## Examples
 ///
 /// ```rust
-/// extern crate ndarray;
-///
 /// use ndarray::Array2;
 /// use ndarray::parallel::par_azip;
 ///

src/slice.rs

@@ -496,8 +496,6 @@ impl_slicenextdim_larger!((), Slice);
 /// # Example
 ///
 /// ```
-/// extern crate ndarray;
-///
 /// use ndarray::{s, Array2, ArrayView2};
 ///
 /// fn laplacian(v: &ArrayView2<f32>) -> Array2<f32> {
@@ -528,8 +526,6 @@ impl_slicenextdim_larger!((), Slice);
 /// For example,
 ///
 /// ```
-/// # extern crate ndarray;
-/// #
 /// # use ndarray::prelude::*;
 /// #
 /// # fn main() {

src/stacking.rs

@@ -86,8 +86,6 @@ where
 /// ***Panics*** if the `stack` function would return an error.
 ///
 /// ```
-/// extern crate ndarray;
-///
 /// use ndarray::{arr2, stack, Axis};
 ///
 /// # fn main() {

src/zip/zipmacro.rs

@@ -38,8 +38,6 @@
 /// ## Examples
 ///
 /// ```rust
-/// extern crate ndarray;
-///
 /// use ndarray::{azip, Array1, Array2, Axis};
 ///
 /// type M = Array2<f32>;