Remove unused Solhint overrides (#4069)

contracts/utils/cryptography/EIP712.sol

@@ -38,7 +38,6 @@ abstract contract EIP712 is IERC5267 {
     bytes32 private constant _TYPE_HASH =
         keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)");
 
-    /* solhint-disable var-name-mixedcase */
     // Cache the domain separator as an immutable value, but also store the chain id that it corresponds to, in order to
     // invalidate the cached domain separator if the chain id changes.
     bytes32 private immutable _cachedDomainSeparator;
@@ -53,8 +52,6 @@ abstract contract EIP712 is IERC5267 {
     bytes32 private immutable _hashedName;
     bytes32 private immutable _hashedVersion;
 
-    /* solhint-enable var-name-mixedcase */
-
     /**
      * @dev Initializes the domain separator and parameter caches.
      *