tests: format/default: rm tvrain.json
tests: format/default: rm tvrain.json

Remove tvrain.json altogether. The media URLs expire after a few days,
it appears.

hadess/libquvi-scripts-iplayer,legatvs/libquvi-scripts,DangerCove/libquvi-scripts,alech/libquvi-scripts,alech/libquvi-scripts,hadess/libquvi-scripts-iplayer,legatvs/libquvi-scripts,DangerCove/libquvi-scripts