remove handling of -gheterogenousdwarf flag

Author: lamb-j

amd/comgr/src/comgr-compiler.cpp

@@ -1924,7 +1924,6 @@ static inline const std::unordered_set<std::string_view> ValidSpirvFlags{
     "-freciprocal-math",
     "-funsafe-math-optimizations",
     "-fvisibility=hidden",
-    "-gheterogeneous-dwarf=diexpression",
     "-O0",
     "-O1",
     "-O2",

amd/comgr/test-lit/spirv-to-reloc-debuginfo.hip

@@ -1,4 +1,3 @@
-// XFAIL: *
 // REQUIRES: comgr-has-spirv
 
 // COM: Generate a debuginfo SPIR-V file from a HIP kernel
@@ -11,7 +10,7 @@
 // RUN:   -check-prefix=CHECK-DBG %s
 
 // COM: Check that debuginfo SPIR-V flags are correctly extracted
-// CHECK-DBG: Driver Job Args: {{.*}} "-gheterogeneous-dwarf=diexpression" "-mllvm -amdgpu-spill-cfi-saved-regs"
+// CHECK-DBG: Driver Job Args: {{.*}} "-mllvm -amdgpu-spill-cfi-saved-regs"
 
 #include <cstdlib>