chore: Remove v3-periphery from gitmodules

- We aren't using this anymore since the solc version is outdated

.gitmodules

@@ -7,9 +7,6 @@
 [submodule "foundry/lib/v2-core"]
 	path = foundry/lib/v2-core
 	url = https://github.com/uniswap/v2-core
-[submodule "foundry/lib/v3-periphery"]
-	path = foundry/lib/v3-periphery
-	url = https://github.com/Uniswap/v3-periphery
 [submodule "foundry/lib/balancer-v2-monorepo"]
 	path = foundry/lib/balancer-v2-monorepo
 	url = https://github.com/balancer/balancer-v2-monorepo

foundry/foundry.toml

@@ -3,7 +3,6 @@ src = 'src'
 out = 'out'
 libs = ['lib']
 solc = "0.8.28"
-auto_detect_solc = true    # Allows per-file version detection
 evm_version = 'shanghai'
 optimizer = true
 optimizer_runs = 1000