Remove all Abseil dependencies

[kuhar]

We cannot use Abseil in dynamically loaded and dynamically unloaded libraries:
https://abseil.io/about/compatibility#what-users-must-and-must-not-do

Dynamic unloading of performance layers causes crashes because of Abseil code.

[Forchapeatl]

Hello @kuhar ,please are we to remove these lines of code ?

vulkan-performance-layers/.gitmodules

Lines 1 to 3 in 1571ee5

	[submodule "external/abseil-cpp"]
	path = third_party/abseil-cpp
	url = https://github.com/abseil/abseil-cpp.git

vulkan-performance-layers/CMakeLists.txt

Lines 27 to 28 in 1571ee5

	# Abseil requires PIC.
	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fPIC")

vulkan-performance-layers/third_party/CMakeLists.txt

Line 16 in 1571ee5

add_subdirectory(abseil-cpp)

[kuhar]

Yes, but we also need to remove any code that uses the abeil libraries and replace it with some combination of the c++ standard library, new hand-rolled counterparts, or possibly some alternative third-party library. The existing abseil code is easy to spot because it starts with absl:: and ABSL_.

[Forchapeatl]

Thank you @kuhar

and replace it with some combination of the c++ standard library, new hand-rolled counterparts, or possibly some alternative third-party library.

Please do we have a replacement library , should I comment out the abseil code or do i just remove the abseil related code ?