Remove fields from Main Entrance

[arch0345]

Closes openstreetmap/iD#9148
Removes fields from Main Entrance preset to match with fields in the generic Entrance preset

[kjonosm]

@arch0345 Does it make sense to also add the entrance field here, so one can switch easily to a different entrance type if needed?

[arch0345]

Good point @kjonosm. I removed fields so that it'll use the fields listed in the generic Entrance preset:

id-tagging-schema/data/presets/entrance.json

Lines 3 to 11 in 0e2138f

	"fields": [
	"ref",
	"entrance",
	"door",
	"access_simple",
	"wheelchair",
	"level",
	"address"
	],