Removed some tersoff variants from threebody test set

examples/threebody/in.threebody

@@ -114,35 +114,3 @@ neighbor        1.0 bin
 neigh_modify    every 1 delay 10 check yes
 run             100
 
-# Test Tersoff/Mod model for Si
-
-clear
-read_restart	restart.equil
-
-pair_style      tersoff/mod
-pair_coeff 	* * Si.tersoff.mod Si Si Si Si Si Si Si Si
-
-thermo          10
-fix             1 all nvt temp $t $t 0.1
-fix_modify 	1 energy yes
-timestep        1.0e-3
-neighbor        1.0 bin
-neigh_modify    every 1 delay 10 check yes
-run             100
-
-# Test Tersoff/Mod/C model for Si
-
-clear
-read_restart	restart.equil
-newton on on
-pair_style      tersoff/mod/c
-pair_coeff 	* * Si.tersoff.modc Si Si Si Si Si Si Si Si
-
-thermo          10
-fix             1 all nvt temp $t $t 0.1
-fix_modify 	1 energy yes
-timestep        1.0e-3
-neighbor        1.0 bin
-neigh_modify    every 1 delay 10 check yes
-run             100
-