Removed tests with dimension 200 and bitsize 100, cleaned up code in test_gram_lll.cpp
Removed tests with dimension 200 and bitsize 100, cleaned up code in test_gram_lll.cpp

fplll/fplll,cr-marcstevens/fplll,dstehle/fplll,fplll/fplll,shi-bai/fplll,shi-bai/fplll,shi-bai/fplll,fplll/fplll,fplll/fplll,dstehle/fplll,shi-bai/fplll,dstehle/fplll,cr-marcstevens/fplll,cr-marcstevens/fplll,cr-marcstevens/fplll,fplll/fplll