Revert "[llvm] Fix assertion error where we didn't check fixed point types." (#82285)

These changes break the `LLVM::fixed-point.ll` test some targets what
fails the builds for those targets
(more details
#80757 (comment))

The problem wasn't fixed for few days,

Reverts #80757

Author: vvereschaka

llvm/lib/CodeGen/AsmPrinter/DebugHandlerBase.cpp

@@ -224,15 +224,12 @@ bool DebugHandlerBase::isUnsignedDIType(const DIType *Ty) {
           Encoding == dwarf::DW_ATE_float || Encoding == dwarf::DW_ATE_UTF ||
           Encoding == dwarf::DW_ATE_boolean ||
           Encoding == dwarf::DW_ATE_complex_float ||
-          Encoding == dwarf::DW_ATE_signed_fixed ||
-          Encoding == dwarf::DW_ATE_unsigned_fixed ||
           (Ty->getTag() == dwarf::DW_TAG_unspecified_type &&
            Ty->getName() == "decltype(nullptr)")) &&
          "Unsupported encoding");
   return Encoding == dwarf::DW_ATE_unsigned ||
          Encoding == dwarf::DW_ATE_unsigned_char ||
          Encoding == dwarf::DW_ATE_UTF || Encoding == dwarf::DW_ATE_boolean ||
-         Encoding == llvm::dwarf::DW_ATE_unsigned_fixed ||
          Ty->getTag() == dwarf::DW_TAG_unspecified_type;
 }