docs(breadcrumb): remove documentation for nonexistent APIs (#26630)

resolves #26625

Author: liamdebeasi

core/api.txt

@@ -193,8 +193,6 @@ ion-breadcrumbs,prop,itemsBeforeCollapse,number,1,false,false
 ion-breadcrumbs,prop,maxItems,number | undefined,undefined,false,false
 ion-breadcrumbs,prop,mode,"ios" | "md",undefined,false,false
 ion-breadcrumbs,event,ionCollapsedClick,BreadcrumbCollapsedClickEventDetail,true
-ion-breadcrumbs,css-prop,--background
-ion-breadcrumbs,css-prop,--color
 
 ion-button,shadow
 ion-button,prop,buttonType,string,'button',false,false

core/src/components/breadcrumbs/breadcrumbs.scss

@@ -4,10 +4,6 @@
 // --------------------------------------------------
 
 :host {
-  /**
-   * @prop --background: Background of the breadcrumbs
-   * @prop --color: Text color of the breadcrumbs
-   */
   @include font-smoothing();
 
   display: flex;