message: valgrind: remove rest_blockhash_by_height suppression
  This should no-longer be necessary after
diff: ...
  fun:_ZN5BCLog6Logger12StartLoggingEv
  }
  -{
  - Suppress rest_blockhash_by_height Conditional jump or move depends on uninitialised value(s)
  - Memcheck:Cond
  - fun:_ZL24rest_blockhash_by_heightP11HTTPRequestRKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE
  -}
  