commands: remove deviceinfo_parse

Since parse.deviceinfo() returns a custom class now, it can't be
trivially serialized as JSON.

This has been broken for months now so it's clear nobody is using this.
Let's take the chance to get rid of it.

Signed-off-by: Caleb Connolly <caleb@postmarketos.org>

pmb/commands/__init__.py

@@ -47,7 +47,6 @@ unmigrated_commands = [
     "install",
     "checksum",
     "build",
-    "deviceinfo_parse",
     "apkbuild_parse",
     "apkindex_parse",
     "config",

pmb/helpers/frontend.py

@@ -456,19 +456,6 @@ def newapkbuild(args: PmbArgs) -> None:
     pmb.build.newapkbuild(args.folder, pass_through, get_context().force)
 
 
-def deviceinfo_parse(args: PmbArgs) -> None:
-    # Default to all devices
-    devices = args.devices
-    if not devices:
-        devices = pmb.helpers.devices.list_codenames()
-
-    # Iterate over all devices
-    kernel = args.deviceinfo_parse_kernel
-    for device in devices:
-        print(f"{device}, with kernel={kernel}:", file=sys.stderr)
-        print(json.dumps(pmb.parse.deviceinfo(device, kernel), indent=4, sort_keys=True))
-
-
 def apkbuild_parse(args: PmbArgs) -> None:
     # Default to all packages
     packages: Sequence[str] = args.packages