Revert "Add Kiro IDE support (.kiro/) (#548)"

This reverts commit ce828c1c3c.

.kiro/steering/golang-patterns.md

@@ -1,45 +0,0 @@
----
-inclusion: fileMatch
-fileMatchPattern: "*.go"
-description: Go-specific patterns including functional options, small interfaces, and dependency injection
----
-
-# Go Patterns
-
-> This file extends the common patterns with Go specific content.
-
-## Functional Options
-
-```go
-type Option func(*Server)
-
-func WithPort(port int) Option {
-    return func(s *Server) { s.port = port }
-}
-
-func NewServer(opts ...Option) *Server {
-    s := &Server{port: 8080}
-    for _, opt := range opts {
-        opt(s)
-    }
-    return s
-}
-```
-
-## Small Interfaces
-
-Define interfaces where they are used, not where they are implemented.
-
-## Dependency Injection
-
-Use constructor functions to inject dependencies:
-
-```go
-func NewUserService(repo UserRepository, logger Logger) *UserService {
-    return &UserService{repo: repo, logger: logger}
-}
-```
-
-## Reference
-
-See skill: `golang-patterns` for comprehensive Go patterns including concurrency, error handling, and package organization.