This reverts commit 6073af53.

Reason for revert: crbug.com/1186140

Original change's description:
> Vulkan: Support EXT_sRGB_write_control
>
> Implement support for EXT_sRGB_write_control. This extension
> requires VK_KHR_image_format_list to be supported.
>
> The spec requires this functionality to work with glBlitFramebuffer
> as well but support for that will be added in a follow up change.
> As such, this extension is only exposed in non-conformant mode.
>
> Bug: angleproject:5075
> Tests: SRGBFramebufferTest.*Vulkan*
> Change-Id: I59b38f6cd810a3d0d67ec29f4f19c25f65f70862
> Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2617243
> Commit-Queue: Mohan Maiya <m.maiya@samsung.com>
> Reviewed-by: Jamie Madill <jmadill@chromium.org>
> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>

Bug: angleproject:5075,chromium:1186140
Change-Id: Ib0d4d60fe7434fb950f99db2c210aab9af7d2d0e
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2743663
Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
Commit-Queue: Peng Huang <penghuang@chromium.org>