Remove logind-zbus dependency

It isn't updated and we don't really need it anyway.

Cargo.lock

@@ -1879,16 +1879,6 @@ version = "0.4.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b5e6163cb8c49088c2c36f57875e58ccd8c87c7427f7fbd50ea6710b2f3f2e8f"
 
-[[package]]
-name = "logind-zbus"
-version = "3.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c07a2542f6e91ea92780158654852190edb2ba0b232d9d00d649d0c691cb7eb3"
-dependencies = [
- "serde",
- "zbus",
-]
-
 [[package]]
 name = "loom"
 version = "0.7.1"
@@ -2062,7 +2052,6 @@ dependencies = [
  "keyframe",
  "libc",
  "log",
- "logind-zbus",
  "niri-config",
  "niri-ipc",
  "notify-rust",