accel/ivpu: Delete the TODO file

The work items listed in the TODO file of this driver file are either
completed or dropped. The file is no more significant according
to the maintainers. Hence removing it from the sources.
Suggested-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com>
Signed-off-by: Deepak R Varma <drv@mailo.com>
Reviewed-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com>
Signed-off-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/ZTAucrOT69/tQK2o@runicha.com

drivers/accel/ivpu/TODO

-- Move to threaded_irqs to mitigate potential infinite loop in ivpu_ipc_irq_handler()
-- Implement support for BLOB IDs
-- Add debugfs support to improve debugging and testing
-- Add tracing events for performance debugging
-- Implement HW based scheduling support
-- Use syncobjs for submit/sync
-- Refactor IPC protocol to improve message latency
-- Implement BO cache and MADVISE IOCTL
-- Add support for user allocated buffers using prime import and dma-buf heaps
-- Refactor struct ivpu_bo to use struct drm_gem_shmem_object
-- Add driver/device documentation