[gn build] Port d328d41

Author: llvmgnsyncbot

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

@@ -50,7 +50,6 @@ static_library("CodeGen") {
     "DFAPacketizer.cpp",
     "DeadMachineInstructionElim.cpp",
     "DetectDeadLanes.cpp",
-    "DroppedVariableStatsMIR.cpp",
     "DwarfEHPrepare.cpp",
     "EHContGuardCatchret.cpp",
     "EarlyIfConversion.cpp",

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

@@ -26,7 +26,6 @@ unittest("CodeGenTests") {
     "CCStateTest.cpp",
     "DIEHashTest.cpp",
     "DIETest.cpp",
-    "DroppedVariableStatsMIRTest.cpp",
     "DwarfStringPoolEntryRefTest.cpp",
     "InstrRefLDVTest.cpp",
     "LexicalScopesTest.cpp",