[gn build] Port 07e3ca2

Author: llvmgnsyncbot

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

@@ -15,6 +15,5 @@ static_library("TextAPI") {
     "Target.cpp",
     "TextStub.cpp",
     "TextStubCommon.cpp",
-    "TextStubV5.cpp",
   ]
 }

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

@@ -10,6 +10,5 @@ unittest("TextAPITests") {
     "TextStubV2Tests.cpp",
     "TextStubV3Tests.cpp",
     "TextStubV4Tests.cpp",
-    "TextStubV5Tests.cpp",
   ]
 }