[gn build] Port 953a814

Author: llvmgnsyncbot

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

@@ -117,7 +117,6 @@ static_library("Support") {
     "Statistic.cpp",
     "StringExtras.cpp",
     "StringMap.cpp",
-    "StringPool.cpp",
     "StringRef.cpp",
     "StringSaver.cpp",
     "SymbolRemappingReader.cpp",

llvm/utils/gn/secondary/llvm/unittests/Support/BUILD.gn

@@ -69,7 +69,6 @@ unittest("SupportTests") {
     "ScaledNumberTest.cpp",
     "SourceMgrTest.cpp",
     "SpecialCaseListTest.cpp",
-    "StringPool.cpp",
     "SwapByteOrderTest.cpp",
     "SymbolRemappingReaderTest.cpp",
     "TarWriterTest.cpp",