Removed unused clalloc() function

src/libstrongswan/utils/utils.h

@@ -375,11 +375,6 @@ typedef struct timespec timespec_t;
  */
 typedef struct sockaddr sockaddr_t;
 
-/**
- * Clone a data to a newly allocated buffer
- */
-void *clalloc(void *pointer, size_t size);
-
 /**
  * Same as memcpy, but XORs src into dst instead of copy
  */