[gn build] Port a566635

Author: llvmgnsyncbot

llvm/utils/gn/secondary/llvm/lib/Target/AMDGPU/BUILD.gn

@@ -139,7 +139,6 @@ static_library("LLVMAMDGPUCodeGen") {
     "AMDGPUAtomicOptimizer.cpp",
     "AMDGPUAttributor.cpp",
     "AMDGPUCallLowering.cpp",
-    "AMDGPUCodeGenPassBuilder.cpp",
     "AMDGPUCodeGenPrepare.cpp",
     "AMDGPUCombinerHelper.cpp",
     "AMDGPUCtorDtorLowering.cpp",