Removed unused imports and changed the import path for custom_spacer_…

…base.py to watertap.core

watertap/core/custom_spacer_base.py

@@ -9,7 +9,6 @@
 # information, respectively. These files are also available online at the URL
 # "https://github.com/watertap-org/watertap/"
 #################################################################################
-import numpy as np  # Required for tracking the spacer performance variables
 from enum import Enum, auto
 from pyomo.core.expr.numeric_expr import sin as pysin
 from pyomo.core.expr.numeric_expr import cos as pycos

watertap/unit_models/ro_1D_custom_spacer.py

@@ -22,7 +22,7 @@
 import idaes.logger as idaeslog
 from pyomo.core import value
 
-from analysisWaterTAP.flowsheets.ro_spacer_optimization.custom_ro_base.custom_spacer_base import (
+from watertap.core.custom_spacer_base import (
     _add_spacer_config,
     CustomSpacer,
     SpacerType,
@@ -35,7 +35,6 @@
 )
 from watertap.core.membrane_channel1d import CONFIG_Template
 from idaes.core.util import scaling as iscale
-from idaes.core.util.tables import create_stream_table_dataframe
 from pyomo.common.formatting import tabular_writer
 from idaes.core.util.units_of_measurement import report_quantity