Small draw_space docstring fix

[quaquel]

The docstring for draw_space contained the description of a keyword argument that was not used. This removes that.

[github-actions]

Performance benchmarks:

Model	Size	Init time [95% CI]	Run time [95% CI]
BoltzmannWealth	small	🔵 -0.5% [-1.2%, +0.2%]	🔵 -0.7% [-1.1%, -0.3%]
BoltzmannWealth	large	🔵 -0.2% [-0.7%, +0.3%]	🔵 -0.6% [-0.8%, -0.3%]
Schelling	small	🔵 -0.5% [-0.8%, -0.3%]	🔵 -0.6% [-0.7%, -0.5%]
Schelling	large	🔵 -3.9% [-12.2%, +0.4%]	🔵 -0.0% [-0.9%, +0.9%]
WolfSheep	small	🔵 +0.5% [+0.2%, +0.7%]	🔵 +0.5% [-0.6%, +1.6%]
WolfSheep	large	🔵 +0.6% [+0.1%, +1.0%]	🔵 +0.9% [-0.2%, +2.0%]
BoidFlockers	small	🔵 +0.9% [+0.3%, +1.6%]	🔵 +1.1% [+0.4%, +2.0%]
BoidFlockers	large	🔵 +1.0% [+0.5%, +1.5%]	🔵 +1.6% [+1.1%, +2.1%]

[EwoutH]

Sorry totally missed this one, thanks for reviewing and merging.