use-of-uninitialized-value in removeFromMap

use-of-uninitialized-value in removeFromMap: a task in MiMo-V2.6-RL-oss: Agentic RL Environments (MiMo RL release). MemorySanitizer: use-of-uninitialized-value in function removeFromMap in file open62541/tests/fuzz/custom memory manager.c