Delete internal/multiagent directory

internal/multiagent/plan_execute_text_test.go

@@ -1,17 +0,0 @@
-package multiagent
-
-import "testing"
-
-func TestUnwrapPlanExecuteUserText(t *testing.T) {
-	raw := `{"response": "你好！很高兴见到你。"}`
-	if got := UnwrapPlanExecuteUserText(raw); got != "你好！很高兴见到你。" {
-		t.Fatalf("got %q", got)
-	}
-	if got := UnwrapPlanExecuteUserText("plain"); got != "plain" {
-		t.Fatalf("got %q", got)
-	}
-	steps := `{"steps":["a","b"]}`
-	if got := UnwrapPlanExecuteUserText(steps); got != steps {
-		t.Fatalf("expected unchanged steps json, got %q", got)
-	}
-}