ci: Drop libFuzzer from msan fuzz task

ci/test/00_setup_env_native_fuzz_with_msan.sh

@@ -25,7 +25,7 @@ export BITCOIN_CONFIG="\
  -DCMAKE_C_FLAGS_DEBUG='' \
  -DCMAKE_CXX_FLAGS_DEBUG='' \
  -DBUILD_FOR_FUZZING=ON \
- -DSANITIZERS=fuzzer,memory \
+ -DSANITIZERS=memory \
  -DAPPEND_CPPFLAGS='-DBOOST_MULTI_INDEX_ENABLE_SAFE_MODE -U_FORTIFY_SOURCE' \
 "
 export USE_INSTRUMENTED_LIBCPP="MemoryWithOrigins"