Remove dead code

Author: advikkabra

src/lpython/semantics/python_ast_to_asr.cpp

@@ -2569,10 +2569,6 @@ class CommonVisitor : public AST::BaseVisitor<Struct> {
         std::string var_name = v_variable->m_name;
         ASR::ttype_t* type = v_variable->m_type;
         if (!init_expr && ASR::is_a<ASR::Dict_t>(*type)) {
-            ASR::ttype_t *key_type = ASR::down_cast<ASR::Dict_t>(type)->m_key_type;
-            ASR::ttype_t *value_type = ASR::down_cast<ASR::Dict_t>(type)->m_value_type;
-            ASR::ttype_t *dict_type = ASRUtils::TYPE(ASR::make_Dict_t(al, loc,
-                                                 key_type, value_type));
             init_expr = ASRUtils::EXPR(ASR::make_DictConstant_t(al, loc, 
                   nullptr, 0, nullptr, 0, type));
         }