[mbsync] Get the account credentials from the secret service

Instead of using my custom Python script that looks them up, just use the
command-line application included in the ‘libsecret’ package on Archlinux.

Remove the custom helper script that I’d written for them.

mbsync/.mbsyncrc

@@ -2,7 +2,7 @@
 IMAPAccount ryuslash
 Host imap-ryuslash.alwaysdata.net
 User tom@ryuslash.org
-PassCmd "~/usr/bin/get-mail-password ryuslash"
+PassCmd "secret-tool lookup application mbsync account ryuslash"
 SSLType IMAPS
 CertificateFile /etc/ssl/certs/ca-certificates.crt
 
@@ -26,7 +26,7 @@ SyncState *
 IMAPAccount gmail
 Host imap.gmail.com
 User ryuslash@gmail.com
-PassCmd "~/usr/bin/get-mail-password gmail"
+PassCmd "secret-tool lookup application mbsync account gmail"
 SSLType IMAPS
 CertificateFile /etc/ssl/certs/ca-certificates.crt
 

mbsync/usr/bin/get-mail-password

@@ -1,12 +0,0 @@
-#!/usr/bin/python3
-
-import sys
-import secretstorage
-
-connection = secretstorage.dbus_init()
-collection = secretstorage.get_collection_by_alias(connection, "login")
-
-for foo in collection.search_items(
-    {"application": "mbsync", "account": sys.argv[1]}
-):
-    print(foo.get_secret().decode())

mbsync/usr/bin/set-mail-password

@@ -1,17 +0,0 @@
-#!/usr/bin/python3
-
-import sys
-from getpass import getpass
-import secretstorage
-
-connection = secretstorage.dbus_init()
-collection = secretstorage.get_collection_by_alias(connection, "login")
-attributes = {"application": "mbsync", "account": sys.argv[1]}
-
-collection.create_item(
-    "Password for '{}' on '{}'".format(
-        attributes["account"], attributes["application"]
-    ),
-    attributes,
-    getpass().encode(),
-)