Remove context-pair logic, superseded by env-template based context resolution

internal/kctl/pairs.go

@@ -1,35 +0,0 @@
-// Package kctl contains the core, non-interactive logic of kctl-tui.
-// Functions here are pure (no kubectl/tmux side effects) so they can be
-// unit tested without a live cluster.
-package kctl
-
-// ContextPair groups a set of related kubectl contexts that should be
-// switchable via TAB while keeping the same namespace (e.g. staging/prod).
-type ContextPair struct {
-	Name     string   `yaml:"name"`
-	Contexts []string `yaml:"contexts"`
-}
-
-// FindNextContext returns the next context in the same pair/group as
-// current, cycling through the group. Returns "", false if current is not
-// part of any configured pair.
-func FindNextContext(current string, pairs []ContextPair) (string, bool) {
-	for _, pair := range pairs {
-		idx := indexOf(pair.Contexts, current)
-		if idx == -1 {
-			continue
-		}
-		next := pair.Contexts[(idx+1)%len(pair.Contexts)]
-		return next, true
-	}
-	return "", false
-}
-
-func indexOf(items []string, target string) int {
-	for i, v := range items {
-		if v == target {
-			return i
-		}
-	}
-	return -1
-}