refactor!: drop unused Logger interface

Signed-off-by: Mark Sagi-Kazar <mark.sagikazar@gmail.com>

logger.go

@@ -5,42 +5,6 @@ import (
 	"log/slog"
 )
 
-// Logger is a unified interface for various logging use cases and practices, including:
-//   - leveled logging
-//   - structured logging
-//
-// Deprecated: use `log/slog` instead.
-type Logger interface {
-	// Trace logs a Trace event.
-	//
-	// Even more fine-grained information than Debug events.
-	// Loggers not supporting this level should fall back to Debug.
-	Trace(msg string, keyvals ...any)
-
-	// Debug logs a Debug event.
-	//
-	// A verbose series of information events.
-	// They are useful when debugging the system.
-	Debug(msg string, keyvals ...any)
-
-	// Info logs an Info event.
-	//
-	// General information about what's happening inside the system.
-	Info(msg string, keyvals ...any)
-
-	// Warn logs a Warn(ing) event.
-	//
-	// Non-critical events that should be looked at.
-	Warn(msg string, keyvals ...any)
-
-	// Error logs an Error event.
-	//
-	// Critical events that require immediate attention.
-	// Loggers commonly provide Fatal and Panic levels above Error level,
-	// but exiting and panicking is out of scope for a logging library.
-	Error(msg string, keyvals ...any)
-}
-
 // WithLogger sets a custom logger.
 func WithLogger(l *slog.Logger) Option {
 	return optionFunc(func(v *Viper) {