fix(MkNetwork): Removed the 's' that was magically inputted

Author: Alexis Oyama

Leanplum-SDK/Classes/Vendor/MKNetworkKit/Leanplum_MKNetworkEngine.m

@@ -24,7 +24,7 @@
 //  THE SOFTWARE.
 #if __IPHONE_OS_VERSION_MIN_REQUIRED < 70000
 
-#import "MKNetworkKit.h"s
+#import "MKNetworkKit.h"
 #import "Constants.h"
 #define kFreezableOperationExtension @"mknetworkkitfrozenoperation"