fixed linter errors and ambigious variable names

tudplot/__init__.py

@@ -5,9 +5,8 @@ import matplotlib as mpl
 from matplotlib import pyplot
 from cycler import cycler
 
-from .xmgrace import export_to_agr, load_agr_data
+from .xmgrace import export_to_agr
 from .tud import tudcolors, nominal_colors, sequential_colors
-from .utils import facet_plot, CurvedText as curved_text
 
 
 def activate(scheme='b', full=False, sequential=False, cmap='blue-red', **kwargs):