Unused variable TAG prevents compilation when compiler warnings "more" or "all" selected

[ethanak]

Arduino IDE version 1.8.19
ESP32 board version 2.0.4
Physical board: any
Preferences setting: Compiler warnings: "more" or "all"
Got compilation error:

/home/ethanak/Arduino/libraries/ESP32Encoder/src/ESP32Encoder.cpp:12:20: error: 'TAG' defined but not used [-Werror=unused-variable]
 static const char* TAG = "ESP32Encoder";
                    ^~~
cc1plus: some warnings being treated as errors