remove devs related examples from devs/examples

[quaquel]

This removes the devs/examples folder which is no longer needed with examples back in the main repo.

[github-actions]

Performance benchmarks:

Model	Size	Init time [95% CI]	Run time [95% CI]
BoltzmannWealth	small	🔵 -1.2% [-1.8%, -0.7%]	🔵 +0.5% [+0.3%, +0.7%]
BoltzmannWealth	large	🔵 -0.3% [-1.5%, +1.5%]	🔵 -1.0% [-1.6%, -0.4%]
Schelling	small	🔵 -0.1% [-0.4%, +0.1%]	🔵 -0.7% [-0.9%, -0.5%]
Schelling	large	🔵 +0.1% [-0.3%, +0.6%]	🔵 +0.2% [-0.2%, +0.7%]
WolfSheep	small	🔵 +0.3% [+0.0%, +0.5%]	🔵 +0.4% [+0.2%, +0.5%]
WolfSheep	large	🔵 +0.6% [+0.1%, +1.0%]	🔵 +2.1% [+1.2%, +2.9%]
BoidFlockers	small	🔵 -0.7% [-1.2%, -0.1%]	🔵 -2.1% [-2.7%, -1.5%]
BoidFlockers	large	🔵 -0.7% [-1.3%, +0.0%]	🔵 -1.9% [-2.3%, -1.5%]