Fixed linter and matplotlib import

lbmpy/__init__.py

@@ -4,7 +4,6 @@ from .lbstep import LatticeBoltzmannStep
 from .macroscopic_value_kernels import pdf_initialization_assignments, macroscopic_values_getter,\
     compile_macroscopic_values_getter, compile_macroscopic_values_setter, create_advanced_velocity_setter_collision_rule
 from .maxwellian_equilibrium import get_weights
-from .plot import boundary_handling
 from .relaxationrates import relaxation_rate_from_lattice_viscosity, lattice_viscosity_from_relaxation_rate,\
     relaxation_rate_from_magic_number
 from .scenarios import create_lid_driven_cavity, create_fully_periodic_flow
@@ -17,14 +16,12 @@ __all__ = ['create_lb_ast', 'create_lb_collision_rule', 'create_lb_function', 'c
            'pdf_initialization_assignments', 'macroscopic_values_getter', 'compile_macroscopic_values_getter',
            'compile_macroscopic_values_setter', 'create_advanced_velocity_setter_collision_rule',
            'get_weights',
-           'boundary_handling',
            'relaxation_rate_from_lattice_viscosity', 'lattice_viscosity_from_relaxation_rate',
            'relaxation_rate_from_magic_number',
            'create_lid_driven_cavity', 'create_fully_periodic_flow',
            'get_stencil']
 
 
-
 from ._version import get_versions
 __version__ = get_versions()['version']
 del get_versions