TO BE SQUASHED: Remove the comment as no longer relevant

Author: hugueskamba

rtos/MemoryPool.h

@@ -183,7 +183,6 @@ class MemoryPool : private mbed::NonCopyable<MemoryPool<T, pool_sz> > {
 
 private:
     osMemoryPoolId_t             _id;
-    /* osMemoryPoolNew requires that pool block size is a multiple of 4 bytes. */
     char                         _pool_mem[MBED_RTOS_STORAGE_MEM_POOL_MEM_SIZE(pool_sz, sizeof(T))];
     mbed_rtos_storage_mem_pool_t _obj_mem;
 };