fix(reader): remove unused context and return nil error (#96)

Remove the unused context parameter in envReader.Read by replacing ctx
with a blank identifier. Change the returned error from ctx.Err() to nil
since the context is not used for cancellation or timeout. This simplifies
the method and clarifies that no error is expected from context handling.

Author: SVilgelm

reader.go

@@ -16,15 +16,15 @@ func (r *envReader) Prefix() string {
 	return r.prefix
 }
 
-func (r *envReader) Read(ctx context.Context) (any, error) {
+func (r *envReader) Read(_ context.Context) (any, error) {
 	res := map[string]string{}
 	for env, key := range r.mapEnvKey {
 		if value, ok := os.LookupEnv(env); ok {
 			res[key] = value
 		}
 	}
 
-	return res, ctx.Err()
+	return res, nil
 }
 
 // New creates the Env reader