Remove utils/Counters.sol (#4289)

Co-authored-by: Francisco Giordano <fg@frang.io>

docs/modules/ROOT/pages/erc721.adoc

@@ -17,11 +17,9 @@ Here's what a contract for tokenized items might look like:
 pragma solidity ^0.8.19;
 
 import "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol";
-import "@openzeppelin/contracts/utils/Counters.sol";
 
 contract GameItem is ERC721URIStorage {
-    using Counters for Counters.Counter;
-    Counters.Counter private _tokenIds;
+    uint256 private _nextTokenId;
 
     constructor() ERC721("GameItem", "ITM") {}
 
@@ -29,12 +27,11 @@ contract GameItem is ERC721URIStorage {
         public
         returns (uint256)
     {
-        uint256 newItemId = _tokenIds.current();
-        _mint(player, newItemId);
-        _setTokenURI(newItemId, tokenURI);
+        uint256 tokenId = _nextTokenId++;
+        _mint(player, tokenId);
+        _setTokenURI(tokenId, tokenURI);
 
-        _tokenIds.increment();
-        return newItemId;
+        return tokenId;
     }
 }
 ----

docs/modules/ROOT/pages/utilities.adoc

@@ -97,8 +97,6 @@ If you need support for more powerful collections than Solidity's native arrays
 [[misc]]
 == Misc
 
-Want to keep track of some numbers that increment by 1 every time you want another one? Check out xref:api:utils.adoc#Counters[`Counters`]. This is useful for lots of things, like creating incremental identifiers, as shown on the xref:erc721.adoc[ERC721 guide].
-
 === Base64
 
 xref:api:utils.adoc#Base64[`Base64`] util allows you to transform `bytes32` data into its Base64 `string` representation.