.clang-tidy: remove invalid key-value pair
.clang-tidy: remove invalid key-value pair

The expected value of 'misc-throw-by-value-catch-by-reference.MaxSize'
is size_t number and the config reader probably cannot cast -1 to
size_t::max and throws warnings. Since we do not use exceptions
in DG, just remove this key.

mchalupa/dg,mchalupa/dg,mchalupa/dg,mchalupa/dg