Redundant word removed (#282)

Author: Gleb Ezhov

en/02_Development_environment.md

@@ -513,7 +513,7 @@ It should look like so (obviously, paths will be different depending on where yo
 Now, in the *Build Phases* tab, on **Link Binary With Libraries** we will add both the `glfw3` and the `vulkan` frameworks. To make things easier we will be adding the dynamic libraries in the project (you can check the documentation of these libraries if you want to use the static frameworks).
 
 * For glfw open the folder `/usr/local/lib` and there you will find a file name like `libglfw.3.x.dylib` ("x" is the library's version number, it might be different depending on when you downloaded the package from Homebrew). Simply drag that file to the Linked Frameworks and Libraries tab on Xcode.
-* For vulkan, go to `vulkansdk/macOS/lib`. Do the same for the file both files `libvulkan.1.dylib` and `libvulkan.1.x.xx.dylib` (where "x" will be the version number of the the SDK you downloaded).
+* For vulkan, go to `vulkansdk/macOS/lib`. Do the same for the both files `libvulkan.1.dylib` and `libvulkan.1.x.xx.dylib` (where "x" will be the version number of the the SDK you downloaded).
 
 After adding those libraries, in the same tab on **Copy Files** change `Destination` to "Frameworks", clear the subpath and deselect "Copy only when installing". Click on the "+" sign and add all those three frameworks here aswell.