Remove trackster reference in custom builds, custom builds will be revisited separately

Author: guerler

client/src/components/User/CustomBuilds.vue

@@ -134,11 +134,6 @@ chr3    159599783
 chr4    155630120
 chr5    152537259</pre
                     >
-                    <p class="card-text">
-                        Trackster uses this information to populate the select box for chrom/contig, andto set the
-                        maximum basepair of the track browser. You may either upload a .len fileof this format (Len File
-                        option), or directly enter the information into the box (Len Entry option).
-                    </p>
                 </b-card>
             </b-col>
         </b-row>