Remove unused variable, initializer, and accessor.

llvm-svn: 224650
diff --git a/llvm/lib/Target/Mips/MipsSubtarget.cpp b/llvm/lib/Target/Mips/MipsSubtarget.cpp
index ade13cc..85f0613 100644
--- a/llvm/lib/Target/Mips/MipsSubtarget.cpp
+++ b/llvm/lib/Target/Mips/MipsSubtarget.cpp
@@ -113,11 +113,10 @@
       ABI(MipsABIInfo::Unknown()), IsLittle(little), IsSingleFloat(false),
       IsFPXX(false), NoABICalls(false), IsFP64bit(false), UseOddSPReg(true),
       IsNaN2008bit(false), IsGP64bit(false), HasVFPU(false), HasCnMips(false),
-      IsLinux(true), HasMips3_32(false), HasMips3_32r2(false),
-      HasMips4_32(false), HasMips4_32r2(false), HasMips5_32r2(false),
-      InMips16Mode(false), InMips16HardFloat(Mips16HardFloat),
-      InMicroMipsMode(false), HasDSP(false), HasDSPR2(false),
-      AllowMixed16_32(Mixed16_32 | Mips_Os16), Os16(Mips_Os16),
+      HasMips3_32(false), HasMips3_32r2(false), HasMips4_32(false),
+      HasMips4_32r2(false), HasMips5_32r2(false), InMips16Mode(false),
+      InMips16HardFloat(Mips16HardFloat), InMicroMipsMode(false), HasDSP(false),
+      HasDSPR2(false), AllowMixed16_32(Mixed16_32 | Mips_Os16), Os16(Mips_Os16),
       HasMSA(false), TM(_TM), TargetTriple(TT),
       DL(computeDataLayout(initializeSubtargetDependencies(CPU, FS, TM))),
       TSInfo(DL), InstrInfo(MipsInstrInfo::create(*this)),
@@ -168,10 +167,6 @@
       report_fatal_error(ISA + " is not compatible with the DSP ASE", false);
   }
 
-  // Is the target system Linux ?
-  if (TT.find("linux") == std::string::npos)
-    IsLinux = false;
-
   if (NoABICalls && TM->getRelocationModel() == Reloc::PIC_)
     report_fatal_error("position-independent code requires '-mabicalls'");