[gn build] Port f3c4b58

Author: llvmgnsyncbot

Diff for: llvm/utils/gn/secondary/lld/ELF/BUILD.gn

@@ -42,7 +42,6 @@ static_library("ELF") {
     "Arch/SystemZ.cpp",
     "Arch/X86.cpp",
     "Arch/X86_64.cpp",
-    "BPSectionOrderer.cpp",
     "CallGraphSort.cpp",
     "DWARF.cpp",
     "Driver.cpp",