fix: duplicate submodule paths (#1242)

Author: andygolay

.gitmodules

@@ -1,13 +1,3 @@
-[submodule "protocol-units/dispute/lib/forge-std"]
-	path = protocol-units/settlement/mcr/contracts/lib/forge-std
-    url = https://github.com/foundry-rs/forge-std
-[submodule "protocol-units/dispute/lib/openzeppelin-contracts"]
-	path = protocol-units/settlement/mcr/contracts/lib/openzeppelin-contracts
-    url = https://github.com/OpenZeppelin/openzeppelin-contracts
-[submodule "protocol-units/dispute/lib/murky"]
-	path = protocol-units/settlement/mcr/contracts/lib/murky
-	url = https://github.com/dmfxyz/murky
-
 [submodule "protocol-units/settlement/mcr/contracts/lib/openzeppelin-foundry-upgrades"]
 	path = protocol-units/settlement/mcr/contracts/lib/openzeppelin-foundry-upgrades
 	url = https://github.com/OpenZeppelin/openzeppelin-foundry-upgrades