lib: fix naming convention of Symbol

`node.js` prefix is used for global symbol(`Symbol.for`).
So remove `node.js` prefix from `Symbol` usage.

Refs: https://github.com/nodejs/node/blob/main/doc/contributing/using-symbols.md#symbolforstring

lib/internal/event_target.js

@@ -65,7 +65,7 @@ const kWeakHandler = Symbol('kWeak');
 const kResistStopPropagation = Symbol('kResistStopPropagation');
 
 const kHybridDispatch = SymbolFor('nodejs.internal.kHybridDispatch');
-const kRemoveWeakListenerHelper = Symbol('nodejs.internal.removeWeakListenerHelper');
+const kRemoveWeakListenerHelper = Symbol('removeWeakListenerHelper');
 const kCreateEvent = Symbol('kCreateEvent');
 const kNewListener = Symbol('kNewListener');
 const kRemoveListener = Symbol('kRemoveListener');

lib/internal/events/symbols.js

@@ -4,7 +4,7 @@ const {
   Symbol,
 } = primordials;
 
-const kFirstEventParam = Symbol('nodejs.kFirstEventParam');
+const kFirstEventParam = Symbol('kFirstEventParam');
 
 module.exports = {
   kFirstEventParam,

lib/internal/http2/util.js

@@ -34,7 +34,7 @@ const {
   kIsNodeError,
 } = require('internal/errors');
 
-const kSensitiveHeaders = Symbol('nodejs.http2.sensitiveHeaders');
+const kSensitiveHeaders = Symbol('sensitiveHeaders');
 const kSocket = Symbol('socket');
 const kProxySocket = Symbol('proxySocket');
 const kRequest = Symbol('request');