webiste: update example.

Author: jaywcjlove

www/src/Example.tsx

@@ -27,24 +27,6 @@ const Example = (props = {} as { mdStr: string }) => {
         autoFocus
         value={state.value}
         overflow={state.overflow}
-        components={{
-          toolbar: (command, disabled, executeCommand) => {
-            if (command.keyCommand === 'code') {
-              return (
-                <button
-                  aria-label="Insert title3"
-                  disabled={disabled}
-                  onClick={(evn) => {
-                    evn.stopPropagation();
-                    executeCommand(command, command.groupName);
-                  }}
-                >
-                  btn
-                </button>
-              );
-            }
-          },
-        }}
         previewOptions={{
           linkTarget: '_blank',
           rehypePlugins: [