Remove unary plus operator type definition

Actually unary plus operators are simplified directly in the AST and are never
present when one defines node types

src/language/ASTNodeDataTypeBuilder.cpp

@@ -101,7 +101,7 @@ ASTNodeDataTypeBuilder::_buildNodeDataTypes(ASTNode& n)
                n.is<language::not_eq_op>() or n.is<language::and_op>() or n.is<language::or_op>() or
                n.is<language::xor_op>()) {
       n.m_data_type = ASTNodeDataType::bool_t;
-    } else if (n.is<language::unary_minus>() or n.is<language::unary_plus>() or n.is<language::unary_plusplus>() or
+    } else if (n.is<language::unary_minus>() or n.is<language::unary_plusplus>() or
                n.is<language::unary_minusminus>()) {
       n.m_data_type = n.children[0]->m_data_type;
     } else if (n.is<language::plus_op>() or n.is<language::minus_op>() or n.is<language::multiply_op>() or