Merge pull request #2330 from lioncash/pragma

common/lz4_compression: Remove #pragma once directive from the cpp file

src/common/lz4_compression.cpp

@@ -2,8 +2,6 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
-#pragma once
-
 #include <algorithm>
 #include <lz4hc.h>