Convert subproject dependency chart to ECharts

Part of our ongoing effort to replace D3 with Apache ECharts throughout the site.  In combination with Kitware#3677, D3 is no longer a dependency of the Vue portion of the site.

Author: williamjallen

app/cdash/tests/autoremovebuilds/CMakeLists.txt

@@ -3,7 +3,6 @@
 add_php_test(deletesubproject)
 set_property(TEST deletesubproject PROPERTY DEPENDS
   cypress/e2e/manage-overview
-  cypress/e2e/sub-project-dependencies
   cypress/e2e/manage-build-group
   cypress/e2e/manage-sub-project
   cypress/e2e/view-test