Cleanup docstring, removed unused type

aws/config.go

@@ -79,18 +79,11 @@ type Config struct {
 	// for testing that do not support the modeled host prefix pattern.
 	DisableEndpointHostPrefix bool
 
-	// ConfigSources are the sources that were used to the aws.Config.
+	// ConfigSources are the sources that were used to construct the Config.
 	// Allows for additional configuration can be loaded by clients.
 	ConfigSources []interface{}
 }
 
-// ConfigResolver is an interface that encapsulates the behavior of loading
-// additional configuration.
-type ConfigResolver interface {
-	// ResolveConfig calls the provide function passing a slice of configuration sources
-	ResolveConfig(func(configs []interface{}) error) error
-}
-
 // NewConfig returns a new Config pointer that can be chained with builder
 // methods to set multiple configuration values inline without using pointers.
 func NewConfig() *Config {