csky: remove unused including <linux/version.h>

Remove including <linux/version.h> that don't need it.

Signed-off-by: Tian Tao <[email protected]>
Signed-off-by: Guo Ren <[email protected]>
diff --git a/arch/csky/include/asm/thread_info.h b/arch/csky/include/asm/thread_info.h
index 21456a3..f704e27 100644
--- a/arch/csky/include/asm/thread_info.h
+++ b/arch/csky/include/asm/thread_info.h
@@ -6,7 +6,6 @@
 
 #ifndef __ASSEMBLY__
 
-#include <linux/version.h>
 #include <asm/types.h>
 #include <asm/page.h>
 #include <asm/processor.h>