Remove unused assigns in hastec.hs.
Remove unused assigns in hastec.hs.

kranich/haste-compiler,beni55/haste-compiler,nyson/haste-compiler,kranich/haste-compiler,szatkus/haste-compiler,santolucito/haste-compiler,kranich/haste-compiler,nyson/haste-compiler,beni55/haste-compiler,szatkus/haste-compiler,beni55/haste-compiler,kranich/haste-compiler,jtojnar/haste-compiler,beni55/haste-compiler,santolucito/haste-compiler,santolucito/haste-compiler,szatkus/haste-compiler,jtojnar/haste-compiler,szatkus/haste-compiler,santolucito/haste-compiler,nyson/haste-compiler,jtojnar/haste-compiler,nyson/haste-compiler,jtojnar/haste-compiler