diff --git a/redshift_connector/core.py b/redshift_connector/core.py
index 3c12530..98e8d1e 100644
--- a/redshift_connector/core.py
+++ b/redshift_connector/core.py
@@ -700,10 +700,6 @@ def get_calling_module() -> str:
         self._read: typing.Callable = self._sock.read
         self._write: typing.Callable = self._sock.write
         self._backend_key_data: typing.Optional[bytes] = None
-
-        trans_tab = dict(zip(map(ord, "{}"), "[]"))
-        glbls = {"Decimal": Decimal}
-
         self.inspect_funcs: typing.Dict[type, typing.Callable] = {
             Datetime: self.inspect_datetime,
             list: self.array_inspect,
diff --git a/redshift_connector/utils/type_utils.py b/redshift_connector/utils/type_utils.py
index 267562b..280c7af 100644
--- a/redshift_connector/utils/type_utils.py
+++ b/redshift_connector/utils/type_utils.py
@@ -222,10 +222,6 @@ def intervald2s_send_integer(v: IntervalDayToSecond) -> bytes:
     return typing.cast(bytes, q_pack(microseconds))
 
 
-glbls: typing.Dict[str, type] = {"Decimal": Decimal}
-trans_tab = dict(zip(map(ord, "{}"), "[]"))
-
-
 # def array_in(data: bytes, idx: int, length: int) -> typing.List:
 #     arr: typing.List[str] = []
 #     prev_c = None