[libc] Allow NVPTX targets to build in debug mode

Summary:
This previously did not work, but recent improvements to the NVPTX
backend allow this to work now.

Author: jhuber6

libc/cmake/modules/prepare_libc_gpu_build.cmake

@@ -72,11 +72,6 @@ else()
 endif()
 set(LIBC_GPU_TARGET_ARCHITECTURE "${gpu_test_architecture}")
 
-# The NVPTX backend cannot currently handle objects created in debug mode.
-if(LIBC_TARGET_ARCHITECTURE_IS_NVPTX AND CMAKE_BUILD_TYPE STREQUAL "Debug")
-  set(LIBC_GPU_TESTS_DISABLED TRUE)
-endif()
-
 # Identify the GPU loader utility used to run tests.
 set(LIBC_GPU_LOADER_EXECUTABLE "" CACHE STRING "Executable for the GPU loader.")
 if(LIBC_GPU_LOADER_EXECUTABLE)