Remove deprecated time module

[EwoutH]

The time module was already deprecated, this PR removes it. See:

• Deprecate Time module and all its Schedulers #2306
• The Future of Schedulers in Mesa #2231

Targeted at Mesa 3.1.

[EwoutH]

#2475 should let the docs build pass.

[github-actions]

Performance benchmarks:

Model	Size	Init time [95% CI]	Run time [95% CI]
BoltzmannWealth	small	🔵 +1.8% [+0.3%, +3.3%]	🔵 +1.5% [+1.3%, +1.7%]
BoltzmannWealth	large	🔵 +0.2% [-0.4%, +0.7%]	🔵 +3.2% [+1.2%, +5.5%]
Schelling	small	🔵 +0.5% [-0.0%, +0.9%]	🔵 +1.2% [+0.8%, +1.5%]
Schelling	large	🔵 +0.9% [+0.1%, +1.7%]	🔵 -0.6% [-2.3%, +1.0%]
WolfSheep	small	🔵 +0.5% [+0.2%, +0.7%]	🔵 +0.0% [-0.2%, +0.2%]
WolfSheep	large	🔵 -0.3% [-1.8%, +1.1%]	🔵 -2.2% [-4.1%, -0.2%]
BoidFlockers	small	🔵 +0.9% [+0.4%, +1.3%]	🔵 +3.3% [+2.6%, +4.1%]
BoidFlockers	large	🔵 +2.7% [+1.9%, +3.3%]	🔴 +4.1% [+3.5%, +4.7%]