[reggen] Remove stray import
This is unused since we removed fusesoc_core_name support and causes a
flake8 lint error.
Signed-off-by: Rupert Swarbrick <rswarbrick@lowrisc.org>
diff --git a/util/reggen/ip_block.py b/util/reggen/ip_block.py
index 4707922..9ff7786 100644
--- a/util/reggen/ip_block.py
+++ b/util/reggen/ip_block.py
@@ -11,7 +11,7 @@
from .alert import Alert
from .bus_interfaces import BusInterfaces
from .inter_signal import InterSignal
-from .lib import (check_keys, check_name, check_int, check_str, check_bool,
+from .lib import (check_keys, check_name, check_int, check_bool,
check_list, check_optional_str, check_name_list)
from .params import ReggenParams, LocalParam
from .reg_block import RegBlock