Revert "fix(cl-form-item):修复必填校验逻辑"

This reverts commit 1517dbaeb589f46b4e728280359f95be6b7992ad.

uni_modules/cool-ui/components/cl-form-item/cl-form-item.uvue

@@ -151,7 +151,7 @@ const labelWidth = computed<string>(() => {
 
 // 计算是否必填
 const required = computed<boolean>(() => {
-	if (props.required != null) {
+	if (props.required !== null && props.required !== undefined) {
 		return props.required;
 	}