L1Calo eFEX Remove unused eFEXFPGA tool

For 2025 the L1Calo eFEX tau BDT was re-trained, resulting in more than one model used for data taking. The model should be set in the Python configuration. However, this second instance of the eFEXFPGA tool is never used and is not initialized in the configuration, resulting in a crash if there is no default model set in C++ or worse if we set a default model in C++ - a mix of two models, one the default set in C++ and one that in the python configuration.

Tagging @thompson @will @jbeaucam @watsona