This reverts commit c8c414b0.

Reason for revert: Breaking fuchsia_x64 and ANGLE autoroller

Original change's description:
> Reland Change to module directory when loading swiftshader ICD.
>
> This is a reland of commit 3b10dda6.
>
> Extra changes:
> Be explicit about calling GetModuleHandleA
> Do not use the general GetModuleHandle, which may use wide strings
>
> GetModuleDirectory should return the full path, not relative.
> ANGLE wasn't able to locate the vulkan ICD file because it was
> searching down an invalid relative path. This can be fixed by
> ensuring the module directory is always the full path.
> on some platforms.
>
> Original change's description:
> > When loading vulkan, we can be running from any directory. We need
> > to change to the module directory to ensure the swiftshader ICD is
> > loaded properly. For example, in some Chrome releases, libGLESv2.dll
> > and libvk_swiftshader.dll are in a subdirectory relative to chrome.exe
> >
> > Bug: chromium:1198567
> > Change-Id: I9e68927e512b239728fb2903d1a04702508a4948
> > Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2873452
> > Commit-Queue: Jonah Ryan-Davis <jonahr@google.com>
> > Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
> > Reviewed-by: Jamie Madill <jmadill@chromium.org>
>
> Bug: chromium:1198567
> Bug: angleproject:5949
> Change-Id: Ib34067002c788f00b5ae2fa11d1e465f57bd7be8
> Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2893503
> Reviewed-by: Jamie Madill <jmadill@chromium.org>
> Reviewed-by: Cody Northrop <cnorthrop@google.com>
> Commit-Queue: Jonah Ryan-Davis <jonahr@google.com>

Bug: chromium:1198567
Bug: angleproject:5949
Change-Id: Ic0be8949cc27b231be4f982ea6e22beed590d24d
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2903786Reviewed-by: Jamie Madill <jmadill@chromium.org>