message: chore(frontend): cleanup of stale code
diff: </v-list-item>
  <!-- Branch menu group -->
  - <!-- TODO: group by "/", eg. dim/a, dim/b, dim/c should be under a sub-group called "dim". -->
  - <!-- <v-list-group v-model="branchMenuOpen" class="my-2">
  - <template #activator>
  - <v-list-item-icon>
  - <v-icon small>mdi-source-branch</v-icon>
  - </v-list-item-icon>
  - <v-list-item-title>Branches ({{ branchesTotalCount }})</v-list-item-title>
  - </template>
  - <v-divider class="mb-1"></v-divider>
  - <v-list-item
  - v-if="stream.role !== 'stream:reviewer'"
  - v-tooltip.bottom="'Create a new branch to help categorise your commits.'"
  - link
  - @click="showNewBranchDialog()"
  - >
  - <v-list-item-icon>
  - <v-icon small style="padding-top: 10px" class="primary--text">mdi-plus-box</v-icon>
  - </v-list-item-icon>
  - <v-list-item-content>
  - <v-list-item-title>New Branch</v-list-item-title>
  - <v-list-item-subtitle class="caption">
  - Create a new branch to help categorise your commits.
  - </v-list-item-subtitle>
  - </v-list-item-content>
  - </v-list-item>
  -
  - <v-list-item
  - v-for="(branch, i) in sortedBranches"
  - v-if="!$apollo.queries.branchQuery.loading"
  - :key="i"
  - link
  - :to="`/streams/${stream.id}/branches/${branch.name}`"
  - >
  - <v-list-item-icon>
  - <v-icon v-if="branch.name !== 'main'" small style="padding-top: 10px">
  - mdi-source-branch
  - </v-icon>
  - <v-icon v-else small style="padding-top: 10px" class="primary--text">mdi-star</v-icon>
  - </v-list-item-icon>
  - <v-list-item-content>
  - <v-list-item-title>
  - {{ branch.name }} ({{ branch.commits.totalCount }})
  - </v-list-item-title>
  - <v-list-item-subtitle class="caption">
  - {{ branch.description ? branch.description : 'no description' }}
  - </v-list-item-subtitle>
  - </v-list-item-content>
  - </v-list-item>
  - <v-skeleton-loader v-else type="list-item-two-line"></v-skeleton-loader>
  - <v-divider class="mb-2"></v-divider>
  - </v-list-group> -->
  -
  <v-list-group v-model="branchMenuOpen" class="my-2">
  <template #activator>
  <v-list-item-icon>
  