Removed antlr2 dependency from build file.
Removed antlr2 dependency from build file.

The build file had dependencies for both antlr2 and antlr3. The former seems redundant and the repo builds without it. Hence removing it.

Migrated from Sable/mclab@f835ca2e940105cb93e84ef7a4d59966205b6ec3

Sable/MiX10,Sable/MiX10,Sable/MiX10,Sable/MiX10,Sable/MiX10