Remove or split up samples that contain signals from multiple devices

[Mindavi]

For me (or anyone interested) to pick up later:

[nix-shell:~/hobby/rtl/tests/tests/oregon_scientific/sl109h]$ $rtl -r ./1461447923.gfile.cu8 -F json
...
Test mode active. Reading samples from file: ./1461447923.gfile.cu8
{"time" : "@0.133180s", "model" : "Oregon-SL109H", "id" : 134, "channel" : 2, "temperature_C" : 26.800, "humidity" : 45, "status" : 0, "mic" : "CHECKSUM"}
{"time" : "@0.672996s", "model" : "Acurite-609TXC", "id" : 94, "battery_ok" : 1, "temperature_C" : 22.600, "humidity" : 55, "status" : 1, "mic" : "CHECKSUM"}

Because that folder contains loads of samples, removing this is fine for me. Prevents people from trying to solve a deemed 'false positive' that's actually a true positive in the wrong location.

Also this one should be split up:

WARNING: LaCrosse-TX35DTHIT generated 1 false positive(s) in other decoders: {'LaCrosse-TX29IT'}

It contains samples of both devices.