Revert "Solve 1319 (#1320)"

This reverts commit 66d9055.

Author: janiversen

pymodbus/datastore/database/redis_datastore.py

@@ -2,11 +2,7 @@
 # pylint: disable=missing-type-doc
 import logging
 
-
-try:
-    import redis
-except ImportError:
-    pass
+import redis
 
 from pymodbus.interfaces import IModbusSlaveContext
 from pymodbus.utilities import pack_bitstring, unpack_bitstring

pymodbus/datastore/database/sql_datastore.py

@@ -2,15 +2,11 @@
 # pylint: disable=missing-type-doc
 import logging
 
-
-try:
-    import sqlalchemy
-    import sqlalchemy.types as sqltypes
-    from sqlalchemy.schema import UniqueConstraint
-    from sqlalchemy.sql import and_
-    from sqlalchemy.sql.expression import bindparam
-except ImportError:
-    pass
+import sqlalchemy
+import sqlalchemy.types as sqltypes
+from sqlalchemy.schema import UniqueConstraint
+from sqlalchemy.sql import and_
+from sqlalchemy.sql.expression import bindparam
 
 from pymodbus.interfaces import IModbusSlaveContext