Remove duplication

SyncPrim/sync-4.md

@@ -4,7 +4,7 @@ Synchronization primitives in the Linux kernel. Part 4.
 Introduction
 --------------------------------------------------------------------------------
 
-This is the fourth part of the [chapter](https://0xax.gitbooks.io/linux-insides/content/SyncPrim/index.html) which describes synchronization primitives in the Linux kernel and in the previous parts we finished to consider different types [spinlocks](https://en.wikipedia.org/wiki/Spinlock) and [semaphore](https://en.wikipedia.org/wiki/Semaphore_%28programming%29) synchronization primitives. We will continue to learn [synchronization primitives](https://en.wikipedia.org/wiki/Synchronization_%28computer_science%29) in this part and consider yet another one which is called - [mutex](https://en.wikipedia.org/wiki/Mutual_exclusion) which is stands for `stands for MUTual EXclusion`.
+This is the fourth part of the [chapter](https://0xax.gitbooks.io/linux-insides/content/SyncPrim/index.html) which describes synchronization primitives in the Linux kernel and in the previous parts we finished to consider different types [spinlocks](https://en.wikipedia.org/wiki/Spinlock) and [semaphore](https://en.wikipedia.org/wiki/Semaphore_%28programming%29) synchronization primitives. We will continue to learn [synchronization primitives](https://en.wikipedia.org/wiki/Synchronization_%28computer_science%29) in this part and consider yet another one which is called - [mutex](https://en.wikipedia.org/wiki/Mutual_exclusion) which is stands for `MUTual EXclusion`.
 
 As in all previous parts of this [book](https://0xax.gitbooks.io/linux-insides/content), we will try to consider this synchronization primitive from the theoretical side and only than we will consider [API](https://en.wikipedia.org/wiki/Application_programming_interface) provided by the Linux kernel to manipulate with `mutexes`.