util: Remove non used UTIL_MAX_L3_CACHES in u_thread.h
cc @jenatali
Split from !18751 (closed) because that abandoned at the current stage, just merge misc fixes first @jenatali
Edited by Yonggang Luo
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cc @jenatali
Split from !18751 (closed) because that abandoned at the current stage, just merge misc fixes first @jenatali