in 3.90 we have this line
AttributeInfo = _productAttributeFormatter.FormatAttributes(sci.Product, sci.AttributesXml, sci.Customer),
To be specific heres requrirement screenshot
#region Cart itemsand find and replace below line
AttributeInfo = _productAttributeFormatter.FormatAttributes(sci.Product, sci.AttributesXml),
AttributeInfo = _productAttributeFormatter.FormatAttributes(sci.Product, sci.AttributesXml,_workContext.CurrentCustomer,renderPrices:false),
public virtual string FormatAttributes(Product product, string attributesXml,
Customer customer, string separator = "<br />", bool htmlEncode = true, bool renderPrices = true,
bool renderProductAttributes = true, bool renderGiftCardAttributes = true,
bool allowHyperlinks = true)
bool renderPrices = true,
bool renderPrices = false,