vkDestroyRenderPass

To destroy a render pass, call:

void vkDestroyRenderPass(
    VkDevice device,
    VkRenderPass renderPass,
    const VkAllocationCallbacks* pAllocator);

device is the logical device that destroys the render pass.
renderPass is the handle of the render pass to destroy.
pAllocator controls host memory allocation as described in the Memory Allocation chapter.

All submitted commands that refer to renderPass must have completed execution

If VkAllocationCallbacks were provided when renderPass was created, a compatible set of callbacks must be provided here

If no VkAllocationCallbacks were provided when renderPass was created, pAllocator must be NULL

device must be a valid VkDevice handle

If renderPass is not VK_NULL_HANDLE, renderPass must be a valid VkRenderPass handle

If pAllocator is not NULL, pAllocator must be a valid pointer to a valid VkAllocationCallbacks structure

If renderPass is a valid handle, it must have been created, allocated, or retrieved from device