1 files changed, 0 insertions, 39 deletions
diff --git a/stmutil/context.go b/stmutil/context.go
deleted file mode 100644
index 6f8ba9b..0000000
--- a/stmutil/context.go
+++ /dev/null
@@ -1,39 +0,0 @@
-package stmutil
-
-import (
-	"context"
-	"sync"
-
-	"github.com/anacrolix/stm"
-)
-
-var (
-	mu      sync.Mutex
-	ctxVars = map[context.Context]*stm.Var[bool]{}
-)
-
-// Returns an STM var that contains a bool equal to `ctx.Err != nil`, and a cancel function to be
-// called when the user is no longer interested in the var.
-func ContextDoneVar(ctx context.Context) (*stm.Var[bool], func()) {
-	mu.Lock()
-	defer mu.Unlock()
-	if v, ok := ctxVars[ctx]; ok {
-		return v, func() {}
-	}
-	if ctx.Err() != nil {
-		// TODO: What if we had read-only Vars? Then we could have a global one for this that we
-		// just reuse.
-		v := stm.NewBuiltinEqVar(true)
-		return v, func() {}
-	}
-	v := stm.NewVar(false)
-	go func() {
-		<-ctx.Done()
-		stm.AtomicSet(v, true)
-		mu.Lock()
-		delete(ctxVars, ctx)
-		mu.Unlock()
-	}()
-	ctxVars[ctx] = v
-	return v, func() {}
-}