LibWeb: Remove unnecessary FIXME marker for CSSStyleDeclaration.cssFloat

Author: https://github.com/awesomekling
Commit: https://github.com/LadybirdBrowser/ladybird/commit/4c94202e97
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/168

Tests/LibWeb/Text/expected/css/cssFloat-property.txt

@@ -0,0 +1,2 @@
+spanRule: [object CSSStyleRule] ~ span { float: right; }
+spanRule.style.cssFloat: right

Tests/LibWeb/Text/input/css/cssFloat-property.html

@@ -0,0 +1,13 @@
+<style>
+span {
+    float: right;
+}
+</style>
+<script src="../include.js"></script>
+<script>
+    test(() => {
+        const spanRule = document.styleSheets[0].cssRules[0];
+        println("spanRule: " + spanRule + " ~ " + spanRule.cssText);
+        println("spanRule.style.cssFloat: " + spanRule.style.cssFloat);
+    });
+</script>

Userland/Libraries/LibWeb/CSS/CSSStyleDeclaration.idl

@@ -14,6 +14,9 @@ interface CSSStyleDeclaration {
     [CEReactions] CSSOMString removeProperty(CSSOMString property);
 
     readonly attribute CSSRule? parentRule;
-    [FIXME, CEReactions, LegacyNullToEmptyString] attribute CSSOMString cssFloat;
+
+    // NOTE: cssFloat is implemented manually in the bindings code, along with the other property accessors.
+    //       Hence, this does not need to be implemented.
+    // [CEReactions, LegacyNullToEmptyString] attribute CSSOMString cssFloat;
 
 };