Revert "Allow using base option with hash under history mode (#1349)"

This reverts commit f5db5b8.

Author: yyx990803

src/history/html5.js

@@ -62,16 +62,6 @@ export class HTML5History extends History {
 
 export function getLocation (base: string): string {
   let path = window.location.pathname
-
-  // Special handling for cases where base contains hash ('#')
-  if (base && base.indexOf('#') > -1) {
-    path = window.location.href.replace(window.location.origin, '')
-    if (path.indexOf(base) === 0) {
-      // Leave the rest of the url as-is
-      return (path.slice(base.length) || '/')
-    }
-  }
-
   if (base && path.indexOf(base) === 0) {
     path = path.slice(base.length)
   }