warning: variable 'pdm_samples' set but not used

[xalbertoisorna]

lib_mic_array/lib_mic_array/api/mic_array/cpp/PdmRx.hpp:634:15:
warning: variable 'pdm_samples' set but not used [-Wunused-but-set-variable]
634 | uint32_t *pdm_samples = GetPdmBlock(); // It's important to Get the Pdm block first in case PdmRx thread is blocked on SendBlock()
| ^