Remove unused dependency

Author: aviggiano

.gitmodules

@@ -1,9 +1,6 @@
 [submodule "lib/forge-std"]
 	path = lib/forge-std
 	url = https://github.com/foundry-rs/forge-std
-[submodule "lib/openzeppelin-contracts"]
-	path = lib/openzeppelin-contracts
-	url = https://github.com/openzeppelin/openzeppelin-contracts
 [submodule "lib/solidity-stringutils"]
 	path = lib/solidity-stringutils
 	url = https://github.com/Arachnid/solidity-stringutils

lib/openzeppelin-contracts

@@ -1,4 +1,3 @@
-@openzeppelin=lib/openzeppelin-contracts
 @src=src
 @test=test
 @script=script

remappings.txt

@@ -5,13 +5,11 @@ import "forge-std/Test.sol";
 
 import {HTTP} from "@src/HTTP.sol";
 import {strings} from "solidity-stringutils/strings.sol";
-import {stdJson} from "forge-std/StdJson.sol";
 
 contract HTTPTest is Test {
     using HTTP for HTTP.Builder;
     using HTTP for HTTP.Request;
     using strings for *;
-    using stdJson for string;
 
     HTTP.Builder http;