message: refactor(flow-client): remove unnecessary input
diff: <flogo-activity-icon
  [iconUrl]="iconUrl"
  [customAltText]="'Activity icon'"
  - [isTerminal]="isTerminal"
  - class="activity__icon">
  - ></flogo-activity-icon>
  + class="activity__icon"
  + >
  + </flogo-activity-icon>
  <div class="activity__name">
  <span>{{ activity.name }}</span>
  <a
  