vfs: remove vfs-mount and vfs-unmount process events

Remove the vfs-mount/vfs-unmount events emitted on process, as they
are insufficient as a security control and a proper permission system
is needed instead.

Author: mcollina

doc/api/vfs.md

@@ -951,32 +951,6 @@ This is particularly dangerous because:
 * Only specific targeted files are affected.
 * Other operations appear to work normally.
 
-### Monitoring VFS mounts
-
-To help detect unauthorized VFS usage, `node:process` emits events when
-a VFS is mounted or unmounted:
-
-```cjs
-process.on('vfs-mount', (info) => {
-  console.log(`VFS mounted at ${info.mountPoint}`);
-  console.log(`  overlay: ${info.overlay}`);
-  console.log(`  readonly: ${info.readonly}`);
-});
-
-process.on('vfs-unmount', (info) => {
-  console.log(`VFS unmounted from ${info.mountPoint}`);
-});
-```
-
-The event object contains:
-
-* `mountPoint` {string} The path where the VFS is mounted.
-* `overlay` {boolean} Whether overlay mode is enabled.
-* `readonly` {boolean} Whether the VFS is read-only.
-
-Applications can use these events to log VFS activity, alert on suspicious
-mounts (such as mounting over system paths), or enforce security policies.
-
 ### Recommendations
 
 * **Audit dependencies**: Be cautious of third-party modules that use VFS, as

lib/internal/vfs/file_system.js

@@ -235,29 +235,13 @@ class VirtualFileSystem {
       this.#hookProcessCwd();
     }
 
-    // Emit mount event for security monitoring
-    process.emit('vfs-mount', {
-      mountPoint: this[kMountPoint],
-      overlay: this[kOverlay],
-      readonly: this[kProvider].readonly,
-    });
-
     return this;
   }
 
   /**
    * Unmounts the VFS.
    */
   unmount() {
-    // Emit unmount event before clearing state (only if currently mounted)
-    if (this[kMounted]) {
-      process.emit('vfs-unmount', {
-        mountPoint: this[kMountPoint],
-        overlay: this[kOverlay],
-        readonly: this[kProvider].readonly,
-      });
-    }
-
     this.#unhookProcessCwd();
     if (this[kModuleHooks]) {
       loadModuleHooks();