fixup: remove unneeded comments

Author: geeksilva97

lib/internal/abort_controller.js

@@ -276,8 +276,6 @@ class AbortSignal extends EventTarget {
         resultSignal[kSourceSignals].add(signalWeakRef);
         signal[kDependantSignals].add(resultSignalWeakRef);
         dependantSignalsCleanupRegistry.register(resultSignal, signalWeakRef);
-        // when the source signal - coming from the controller - is gced, we need to remove it from the dependant
-        // signals of the composite signal
         finalizer.register(signal, { sourceSignalRef: signalWeakRef, composedSignalRef: resultSignalWeakRef});
       } else if (!signal[kSourceSignals]) {
         continue;