Remove two test files with corrupted data

These are clearly hand-written and they're equally clearly just wrong.

Specifically both of them have hexadecimal digits in their device
identifiers, which isn't allowed.

Initially I fixed this, but the -2 file also had an invalid manufacturer
code so I figure it's a lot easier to just discard them than keep trying
to fix things and creating even more invalid data.

Author: Lexicality

libmbus_test_data/test-frames/electricity-meter-1.hex

@@ -32,8 +32,6 @@ mod test_parse {
 			"EDC.hex",
 			"EFE_Engelmann-Elster-SensoStar-2.hex",
 			"EFE_Engelmann-WaterStar.hex",
-			"electricity-meter-1.hex",
-			"electricity-meter-2.hex",
 			"ELS_Elster-F96-Plus.hex",
 			"els_falcon.hex",
 			"Elster-F2.hex",