fix(controller): 多层等差弯计算BUG

pages/formula/duochengdengwan.vue

@@ -121,10 +121,6 @@
                     this.$u.toast('请输入边高');
                     return
                 }
-                if(!this.formData.xiebian){
-                    this.$u.toast('请输入起弯');
-                    return
-                }
                 this.initRules();
 
                 this.formData.angle = parseFloat(this.formData.angle);