Remove unused blob imports from fetch.py and table.py

Author: claude

src/datajoint/fetch.py

@@ -10,7 +10,7 @@
 
 from datajoint.condition import Top
 
-from . import blob, hash
+from . import hash
 from .errors import DataJointError
 from .settings import config
 from .utils import safe_write

src/datajoint/table.py

@@ -12,7 +12,6 @@
 import numpy as np
 import pandas
 
-from . import blob
 from .condition import make_condition
 from .declare import alter, declare
 from .errors import (