Doxygen comment update and PREDEFINED in Doxyfile is properly defined (#5186)

JerryScript-DCO-1.0-Signed-off-by: Yonggang Luo luoyonggang@gmail.com

jerry-core/jmem/jmem-heap.c

@@ -459,8 +459,6 @@ jmem_heap_insert_block (jmem_heap_free_t *block_p, /**< block to insert */
 
 /**
  * Internal method for freeing a memory block.
- *
- * @return void
  */
 void JERRY_ATTR_HOT
 jmem_heap_free_block_internal (void *ptr, /**< pointer to beginning of data space of the block */
@@ -695,8 +693,6 @@ jmem_heap_realloc_block (void *ptr, /**< memory region to reallocate */
 
 /**
  * Free memory block
- *
- * @return void
  */
 extern inline void JERRY_ATTR_HOT JERRY_ATTR_ALWAYS_INLINE
 jmem_heap_free_block (void *ptr, /**< pointer to beginning of data space of the block */

jerry-core/jmem/jmem-poolman.c

@@ -114,8 +114,6 @@ jmem_pools_alloc (size_t size) /**< size of the chunk */
 
 /**
  * Free the chunk
- *
- * @return void
  */
 extern inline void JERRY_ATTR_HOT JERRY_ATTR_ALWAYS_INLINE
 jmem_pools_free (void *chunk_p, /**< pointer to the chunk */