[MC] Remove unused MCAsmBackend::isMicroMips() method (NFC) (#135581)

The only use was removed by 4c89277.

Author: s-barannikov

llvm/include/llvm/MC/MCAsmBackend.h

@@ -223,11 +223,6 @@ class MCAsmBackend {
     return 0;
   }
 
-  /// Check whether a given symbol has been flagged with MICROMIPS flag.
-  virtual bool isMicroMips(const MCSymbol *Sym) const {
-    return false;
-  }
-
   bool isDarwinCanonicalPersonality(const MCSymbol *Sym) const;
 };
 

llvm/lib/Target/Mips/MCTargetDesc/MipsAsmBackend.cpp

@@ -602,14 +602,6 @@ bool MipsAsmBackend::shouldForceRelocation(const MCAssembler &Asm,
   }
 }
 
-bool MipsAsmBackend::isMicroMips(const MCSymbol *Sym) const {
-  if (const auto *ElfSym = dyn_cast<const MCSymbolELF>(Sym)) {
-    if (ElfSym->getOther() & ELF::STO_MIPS_MICROMIPS)
-      return true;
-  }
-  return false;
-}
-
 namespace {
 
 class WindowsMipsAsmBackend : public MipsAsmBackend {

llvm/lib/Target/Mips/MCTargetDesc/MipsAsmBackend.h

@@ -54,8 +54,6 @@ class MipsAsmBackend : public MCAsmBackend {
   bool shouldForceRelocation(const MCAssembler &Asm, const MCFixup &Fixup,
                              const MCValue &Target,
                              const MCSubtargetInfo *STI) override;
-
-  bool isMicroMips(const MCSymbol *Sym) const override;
 }; // class MipsAsmBackend
 
 } // namespace