removes unused plugins (#186)

main.go

plugins/dashboard/parameters.go

plugins/dashboard/plugin.go

plugins/dashboard/tps.go

plugins/dashboard/tps_template.go

plugins/ui/files.go

plugins/ui/logger.go

plugins/ui/nodeInfo.go

plugins/ui/src/builder.js

plugins/ui/src/css/styles.css

plugins/ui/src/favicon.ico

plugins/ui/src/index.html

plugins/ui/src/js/forcegraph.js

plugins/ui/src/js/icons.js

plugins/ui/src/js/initials.js

plugins/ui/src/js/main.js

plugins/ui/src/js/tpschart.js

plugins/ui/src/js/utils.js

plugins/ui/txLog.go

plugins/ui/ui.go