fix bug user search API pagesize didn't obey ExplorePagingNum (#6579)

routers/api/v1/user/user.go

@@ -55,9 +55,6 @@ func Search(ctx *context.APIContext) {
 		Type:     models.UserTypeIndividual,
 		PageSize: com.StrTo(ctx.Query("limit")).MustInt(),
 	}
-	if opts.PageSize <= 0 {
-		opts.PageSize = 10
-	}
 
 	users, _, err := models.SearchUsers(opts)
 	if err != nil {