Slows down even if x_labels=False

[renehommel]

First, thank you for providing this great libary! I faced an issue on rather large data sets, in particular when option x_labels is set to False. Suggests to insert an
if x_labels == True: before, similar as it is done on bottom of function. Because, whe I don't want to plot labels, why should plt.xticks(x) be executed?

recmetrics/recmetrics/plots.py

Line 44 in 082536a

plt.xticks(x)