[gn build] Port 3700587

Author: llvmgnsyncbot

llvm/utils/gn/secondary/llvm/lib/BinaryFormat/BUILD.gn

@@ -12,7 +12,6 @@ static_library("BinaryFormat") {
     "ELF.cpp",
     "MachO.cpp",
     "Magic.cpp",
-    "Minidump.cpp",
     "MsgPackDocument.cpp",
     "MsgPackDocumentYAML.cpp",
     "MsgPackReader.cpp",