Kernel panic when delete BLEClient object with descriptor characteristic (#8010)

* Update BLERemoteCharacteristic.cpp

Fix kernel panic issue when trying to release BLEClient when the target device have a ble descriptor.

* Update BLERemoteCharacteristic.cpp
Co-authored-by: Lucas Saavedra Vaz <lucassvaz@yahoo.com.br>

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Co-authored-by: Lucas Saavedra Vaz <lucas.vaz@espressif.com>
Co-authored-by: Lucas Saavedra Vaz <lucassvaz@yahoo.com.br>

libraries/BLE/src/BLERemoteCharacteristic.cpp

@@ -520,10 +520,9 @@ void BLERemoteCharacteristic::registerForNotify(notify_callback notifyCallback,
 void BLERemoteCharacteristic::removeDescriptors() {
 	// Iterate through all the descriptors releasing their storage and erasing them from the map.
 	for (auto &myPair : m_descriptorMap) {
-	   m_descriptorMap.erase(myPair.first);
 	   delete myPair.second;
 	}
-	m_descriptorMap.clear();   // Technically not neeeded, but just to be sure.
+	m_descriptorMap.clear();
 } // removeCharacteristics