Remove context-related configuration options from WorkerGroup

this is not needed anymore, as Go func accepts external context

README.md

@@ -367,7 +367,6 @@ p := pool.New[string](2, worker).
 	WithBatchSize(10).             // process items in batches
     WithWorkerChanSize(5).         // set worker channel buffer size
     WithChunkFn(chunkFn).          // control work distribution
-    WithContext(ctx).              // set custom context
     WithContinueOnError().         // don't stop on errors
     WithCompleteFn(completeFn)     // called when worker finishes
 ```
@@ -376,7 +375,6 @@ Available options:
 - `WithBatchSize(size int)` - enables batch processing, accumulating items before sending to workers
 - `WithWorkerChanSize(size int)` - sets buffer size for worker channels
 - `WithChunkFn(fn func(T) string)` - controls work distribution by key
-- `WithContext(ctx context.Context)` - sets custom context for cancellation
 - `WithContinueOnError()` - continues processing on errors
 - `WithCompleteFn(fn func(ctx, id, worker))` - called on worker completion
 

pool.go

@@ -74,7 +74,6 @@ func New[T any](size int, worker Worker[T]) *WorkerGroup[T] {
 		worker:         worker,
 		batchSize:      1,
 		workerChanSize: 1,
-		ctx:            context.Background(),
 	}
 	res.err.ch = make(chan struct{})
 
@@ -156,13 +155,6 @@ func (p *WorkerGroup[T]) WithChunkFn(fn func(T) string) *WorkerGroup[T] {
 	return p
 }
 
-// WithContext sets the context for the pool. This is used to control the lifecycle of the pool.
-// Default: context.Background()
-func (p *WorkerGroup[T]) WithContext(ctx context.Context) *WorkerGroup[T] {
-	p.ctx = ctx
-	return p
-}
-
 // WithContinueOnError sets whether the pool should continue on error.
 // Default: false
 func (p *WorkerGroup[T]) WithContinueOnError() *WorkerGroup[T] {