[debugserver] Remove unused variable

[jasonmolenda]

LGTM

lldb/tools/debugserver/source/RNBRemote.cpp

void GenerateTargetXMLRegister(std::ostringstream &s, const uint32_t reg_num,
                                const register_map_entry_t &reg) {
   const char *default_lldb_encoding = "uint";
   const char *lldb_encoding = default_lldb_encoding;
   const char *gdb_group = "general";
   const char *default_gdb_type = "int";
   const char *gdb_type = default_gdb_type;
   const char *default_lldb_format = "hex";
   const char *lldb_format = default_lldb_format;
-  const char *lldb_set = NULL;
 
   switch (reg.nub_info.type) {
   case Uint:
     lldb_encoding = "uint";
     break;
   case Sint:
     lldb_encoding = "sint";
     break;
case VectorOfFloat32:
     gdb_type = "float";
     lldb_format = "vector-float32";
     break;
   case VectorOfUInt128:
     gdb_type = "float";
     lldb_format = "vector-uint128";
     break;
   };
-  if (reg_set_info && reg.nub_info.set < num_reg_sets)
-    lldb_set = reg_set_info[reg.nub_info.set].name;
 
   uint32_t indent = 2;
 
   XMLElementStart(s, indent, "reg", true);
   XMLAttributeString(s, "name", reg.nub_info.name);
   XMLAttributeUnsignedDecimal(s, "regnum", reg_num);
   XMLAttributeUnsignedDecimal(s, "offset", reg.offset);
   XMLAttributeUnsignedDecimal(s, "bitsize", reg.nub_info.size * 8);