cli: Remove direct initialization of eyre handler

As long as Abscissa framework's Terminal component performs
eyre initialization under the hood and panics if it's already initialized,
the application should not do it. Unfortunately, Abscissa's initialization
of the error handler is directed only by terminal colorization choice,
which should be orthogonal to the user's preference for backtraces
in the reports.

Filed iqlusioninc/abscissa#589 to bring this
problem up to Abscissa's developers.

relayer-cli/Cargo.toml

@@ -36,9 +36,6 @@ serde = { version = "1", features = ["serde_derive"] }
 tokio = { version = "1.0", features = ["full"] }
 tracing = "0.1.29"
 tracing-subscriber = { version = "0.3.1", features = ["fmt", "env-filter", "json"]}
-eyre = "0.6.5"
-color-eyre = "0.5"
-oneline-eyre = "0.1"
 futures = "0.3.17"
 toml = "0.5.8"
 serde_derive = "1.0.116"

relayer-cli/src/bin/hermes/main.rs

@@ -5,28 +5,6 @@
 
 use ibc_relayer_cli::application::APPLICATION;
 
-fn main() -> eyre::Result<()> {
-    install_error_reporter()?;
-
+fn main() {
     abscissa_core::boot(&APPLICATION);
 }
-
-fn install_error_reporter() -> eyre::Result<()> {
-    if !backtrace_enabled() {
-        // If backtraces are disabled, display errors in single line.
-        oneline_eyre::install()
-    } else {
-        // Otherwise, backtraces are enabled, so use the
-        // default error report handler. The impl for
-        // Application::framework_components takes care about
-        // initialization of color_eyre.
-        Ok(())
-    }
-}
-
-fn backtrace_enabled() -> bool {
-    match std::env::var("RUST_BACKTRACE").as_deref() {
-        Ok("" | "0") | Err(_) => false,
-        Ok(_) => true,
-    }
-}