DevTools: [CSS] remove getAllStylesheets method from protocol

Source/devtools/protocol.json

Index: Source/devtools/protocol.json
diff --git a/Source/devtools/protocol.json b/Source/devtools/protocol.json
index 91f974eb9356d3535a0e5f4a81152bac63c89196..af9284cb0272cc77b40ca84853dbb5281ebc25ff 100644
--- a/Source/devtools/protocol.json
+++ b/Source/devtools/protocol.json
@@ -2670,13 +2670,6 @@
                 "hidden": true
             },
             {
-                "name": "getAllStyleSheets",
-                "returns": [
-                    { "name": "headers", "type": "array", "items": { "$ref": "CSSStyleSheetHeader" }, "description": "Descriptor entries for all available stylesheets." }
-                ],
-                "description": "Returns metainfo entries for all known stylesheets."
-            },
-            {
                 "name": "getStyleSheet",
                 "parameters": [
                     { "name": "styleSheetId", "$ref": "StyleSheetId" }