build: Remove unused dependencies

Some of our dependencies are apparently unused, so we can remove them.

I identified some of these manually, before realizing that the `cargo udeps` command can find unused dependencies automatically (this functionality is unfortunately not built into Cargo). We should consider adding `cargo udeps` as a CI check to avoid accumulating unused dependencies in the future.

Cargo.toml

@@ -13,7 +13,6 @@ backoff = "0.4.0"
 backtrace = "0.3.67"
 brotli2 = "0.3.2"
 bytecount = "0.6.3"
-chardet = "0.2.4"
 chrono = { version = "0.4.31", features = ["serde"] }
 clap = { version = "4.1.6", default-features = false, features = [
   "derive",
@@ -31,7 +30,6 @@ curl = { version = "0.4.46", features = ["static-curl", "static-ssl"] }
 dirs = "4.0.0"
 dotenv = "0.15.0"
 elementtree = "1.2.3"
-encoding = "0.2.33"
 flate2 = { version = "1.0.25", default-features = false, features = [
   "rust_backend",
 ] }
@@ -46,7 +44,6 @@ java-properties = "1.4.1"
 lazy_static = "1.4.0"
 libc = "0.2.139"
 log = { version = "0.4.17", features = ["std"] }
-might-be-minified = "0.3.0"
 open = "3.2.0"
 parking_lot = "0.12.1"
 percent-encoding = "2.2.0"
@@ -86,7 +83,6 @@ secrecy = "0.8.0"
 assert_cmd = "2.0.11"
 insta = { version = "1.26.0", features = ["redactions", "yaml"] }
 mockito = "1.6.1"
-predicates = "2.1.5"
 rstest = "0.18.2"
 tempfile = "3.8.1"
 trycmd = "0.14.11"
@@ -102,15 +98,11 @@ with_crash_reporting = []
 
 [target."cfg(target_os = \"macos\")".dependencies]
 mac-process-info = "0.2.0"
-osascript = "0.3.0"
-unix-daemonize = "0.1.2"
 
 [target."cfg(unix)"]
 
 [target."cfg(unix)".dependencies]
 openssl-probe = "0.1.5"
-signal-hook = "0.3.15"
-crossbeam-channel = "0.5.6"
 
 [target."cfg(windows)"]