Revert "[mips] Add support for the new mips-mti-linux toolchain."

This reverts commits r251633. I'll investigate the test failure off trunk in
order to keep the buildbots clean.

llvm-svn: 251698
diff --git a/clang/lib/Driver/ToolChains.h b/clang/lib/Driver/ToolChains.h
index a613d09..4d25a3b 100644
--- a/clang/lib/Driver/ToolChains.h
+++ b/clang/lib/Driver/ToolChains.h
@@ -746,7 +746,6 @@
   SanitizerMask getSupportedSanitizers() const override;
   void addProfileRTLibs(const llvm::opt::ArgList &Args,
                         llvm::opt::ArgStringList &CmdArgs) const override;
-  virtual std::string computeSysRoot() const;
 
   std::string Linker;
   std::vector<std::string> ExtraOpts;
@@ -754,6 +753,9 @@
 protected:
   Tool *buildAssembler() const override;
   Tool *buildLinker() const override;
+
+private:
+  std::string computeSysRoot() const;
 };
 
 class LLVM_LIBRARY_VISIBILITY CudaToolChain : public Linux {
@@ -768,42 +770,6 @@
                              llvm::opt::ArgStringList &CC1Args) const override;
 };
 
-class LLVM_LIBRARY_VISIBILITY MipsLLVMToolChain : public Linux {
-protected:
-  Tool *buildLinker() const override;
-
-public:
-  MipsLLVMToolChain(const Driver &D, const llvm::Triple &Triple,
-                    const llvm::opt::ArgList &Args);
-
-  void
-  AddClangSystemIncludeArgs(const llvm::opt::ArgList &DriverArgs,
-                            llvm::opt::ArgStringList &CC1Args) const override;
-
-  CXXStdlibType GetCXXStdlibType(const llvm::opt::ArgList &Args) const override;
-
-  void AddClangCXXStdlibIncludeArgs(
-      const llvm::opt::ArgList &DriverArgs,
-      llvm::opt::ArgStringList &CC1Args) const override;
-
-  void AddCXXStdlibLibArgs(const llvm::opt::ArgList &Args,
-                           llvm::opt::ArgStringList &CmdArgs) const override;
-
-  std::string getCompilerRT(const llvm::opt::ArgList &Args, StringRef Component,
-                            bool Shared = false) const override;
-
-  std::string computeSysRoot() const override;
-
-  RuntimeLibType GetDefaultRuntimeLibType() const override {
-    return GCCInstallation.isValid() ? RuntimeLibType::RLT_Libgcc
-                                     : RuntimeLibType::RLT_CompilerRT;
-  }
-
-private:
-  Multilib SelectedMultilib;
-  std::string LibSuffix;
-};
-
 class LLVM_LIBRARY_VISIBILITY HexagonToolChain : public Linux {
 protected:
   GCCVersion GCCLibAndIncVersion;