code: def test_abline_remove(self, close_figures):
      mod = self.mod
      intercept, slope = mod.params
      fig = plt.figure()
      ax = fig.add_subplot(111)
      ax.scatter(self.X[:, 1], self.y)
      abline_plot(intercept=intercept, slope=slope, ax=ax)
      abline_plot(intercept=intercept, slope=2 * slope, ax=ax)
      lines = ax.get_lines()
      lines.pop(0).remove()
      close_or_save(pdf, fig)
  
imports: import numpy
  from numpy.testing import assert_array_less, assert_equal, assert_raises
  from pandas import DataFrame, Series
  import pytest
  import statsmodels.api
  from statsmodels.graphics.regressionplots import abline_plot, add_lowess, influence_plot, plot_added_variable, plot_ccpr, plot_ccpr_grid, plot_ceres_residuals, plot_fit, plot_leverage_resid2, plot_partial_residuals, plot_partregress_grid, plot_regress_exog
label_desc: Use image node_id 6 for calling the TestABLine obj's underlying member method code with example usage: obj.test_abline_remove(close_figures) without return types