Remove unused classes from the selection

do we really need to select stl generators at all?

Author: dpiparo

math/mathcore/inc/LinkDef2.h

@@ -51,18 +51,12 @@
 //#pragma link C++ struct mixmax::mixmax_engine<256>::rng_state_st+;
 //#pragma link C++ struct mixmax::mixmax_engine<17>::rng_state_st+;
 //#pragma link C++ struct mixmax::_Generator<ULong64_t,0,2305843009213693951>+;
-//#pragma link C++ class std::mt19937_64+;
-//#pragma link C++ class std::ranlux48+;
 
 #pragma link C++ class std::mersenne_twister_engine< uint_fast64_t, 64, 312, 156, 31, 0xb5026f5aa96619e9ULL, 29, 0x5555555555555555ULL, 17, 0x71d67fffeda60000ULL, 37, 0xfff7eee000000000ULL, 43, 6364136223846793005ULL >+;
 
 #pragma link C++ class std::subtract_with_carry_engine<std::uint_fast64_t, 48, 5, 12>+;
 #pragma link C++ class std::discard_block_engine<std::ranlux48_base, 389, 11>+;
 
-#pragma link C++ typedef std::mt19937_64;
-#pragma link C++ typedef std::ranlux48;
-
-
 #pragma link C++ class TRandomGen<ROOT::Math::MixMaxEngine<240,0>>+;
 #pragma link C++ class TRandomGen<ROOT::Math::MixMaxEngine<256,0>>+;
 #pragma link C++ class TRandomGen<ROOT::Math::MixMaxEngine<256,2>>+;