Revert queueTimeout fix as it requires more analysis

Author: sharadraju

doc/src/release_notes.rst

@@ -58,9 +58,6 @@ Common Changes
     be raised as an ``NJS-500`` error with the underlying reason being
     included in the error message.
 
-#)  Improved connection pool's queueTimeout behavior to account for network
-    delays and pool expansion delays.
-
 #)  Fixed bug which does not trigger PL/SQL functions registered for callbacks
     properly when using implicit pooling with temporary LOBs creation.
 

lib/connection.js

@@ -797,12 +797,7 @@ class Connection extends EventEmitter {
 
     this._closing = true;
     try {
-      // If connection is part of a pool, notify the pool of its availability
-      if (this._pool) {
-        await this._pool._release(this._impl, options);
-      } else {
-        await this._impl.close(options);
-      }
+      await this._impl.close(options);
     } finally {
       this._closing = false;
     }
@@ -814,6 +809,7 @@ class Connection extends EventEmitter {
       }
     }
     this._dbObjectClasses.clear();
+    this.emit('_afterConnClose');
   }
 
   //---------------------------------------------------------------------------