Don't pass label when creating color cycle scout

[mwaskom]

Fixes #3115

import numpy as np
import seaborn as sns

rng = np.random.default_rng(43)
data = rng.random(1000)
ax = sns.histplot(data, label="Random Data", stat="density")
ax.legend()

[codecov]

Codecov Report

Merging #3116 (c6b51bc) into master (852ffaf) will increase coverage by 0.00%.
The diff coverage is 100.00%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3116   +/-   ##
=======================================
  Coverage   98.41%   98.41%           
=======================================
  Files          76       76           
  Lines       24049    24056    +7     
=======================================
+ Hits        23668    23675    +7     
  Misses        381      381           

Impacted Files	Coverage Δ
seaborn/utils.py	95.46% <100.00%> (+0.02%)	⬆️
tests/test_distributions.py	99.79% <100.00%> (+<0.01%)	⬆️