revert example

docs/components/input.md

@@ -4,25 +4,6 @@
 
 ```html preview
 <sl-input></sl-input>
-
-F1
-<form id="f1" action="" method="GET" target="_blank">
-  <input type="hidden" name="b" value="2" />
-  <sl-button type="submit">Submit 1</sl-button>
-</form>
-
-<br />
-
-F2
-<form id="f2" action="" method="GET" target="_blank">
-  <input type="hidden" name="c" value="3" />
-  <sl-button type="submit">Submit 2</sl-button>
-</form>
-
-<br />
-
-Custom
-<sl-input id="mine" name="a" form="f1" value="123"></sl-input>
 ```
 
 ```jsx react