[meson] remove obsolete io_batch_anywhere_completions option

Since 8f38dbed the globalCompleter
does always reap and schedule in batches through
IoContest::reapAndSchedule<CallerEnvironment::ANYWHERE> ->
Runtime::scheduleFromAnywhere(Input it begin, InputIt end) ->
AnywhereQueue::insert(Input it begin, InputIt end)

emper/Emper.hpp

@@ -97,11 +97,4 @@ static const bool IO_URING_SHARED_WQ =
 		false
 #endif
 		;
-static const bool IO_BATCH_ANYWHERE_COMPLETIONS =
-#ifdef EMPER_IO_BATCH_ANYWHERE_COMPLETIONS
-		true
-#else
-		false
-#endif
-		;
 }	 // namespace emper

meson.build

@@ -73,7 +73,6 @@ endif
 io_bool_options = [
 	'uring_sqpoll',
 	'uring_shared_wq',
-	'batch_anywhere_completions',
 ]
 
 io_raw_options = [

meson_options.txt

@@ -115,9 +115,3 @@ option(
   value: false,
   description: 'Share a common async backend between all io_urings'
 )
-option(
-  'io_batch_anywhere_completions',
-  type: 'boolean',
-  value: false,
-  description: 'Collect and schedule all completions reaped by the global completer at once'
-)