Remove outdated TODOs

The one in CssContentPropertyResolver seems to be already resolved, since we do float children
The one in SpanTagCssApplier could have been done, but the code application seems to be quite
dirty either in a css applier or in a node

DEVSIX-6522

Author: ars18wrw

src/main/java/com/itextpdf/html2pdf/css/apply/impl/SpanTagCssApplier.java

@@ -95,7 +95,6 @@ public void apply(ProcessorContext context, IStylesContainer stylesContainer, IT
             }
         }
 
-        // TODO as for now spans are flattened, let's at least make kids of floating spans floating too
         String floatVal = cssStyles.get(CssConstants.FLOAT);
         if (floatVal != null && !CssConstants.NONE.equals(floatVal)) {
             for (IPropertyContainer elem : spanTagWorker.getAllElements()) {

src/main/java/com/itextpdf/html2pdf/css/resolve/CssContentPropertyResolver.java

@@ -222,7 +222,6 @@ static List<INode> resolveContent(Map<String, String> styles, INode contentConta
             } else if (token.getValue().startsWith("url(")) {
                 Map<String, String> attributes = new HashMap<>();
                 attributes.put(AttributeConstants.SRC, CssUtils.extractUrl(token.getValue()));
-                //TODO: probably should add user agent styles on CssContentElementNode creation, not here.
                 attributes.put(AttributeConstants.STYLE, CssConstants.DISPLAY + ":" + CssConstants.INLINE_BLOCK);
                 result.add(new CssContentElementNode(contentContainer, TagConstants.IMG, attributes));
             } else if (CssGradientUtil.isCssLinearGradientValue(token.getValue())) {