Added a clang_delta pass remove-unused-var
Added a clang_delta pass remove-unused-var

Panos90/csmith,jacekburys/csmith,DmitryOlshansky/dsmith,natgla/csmith,jacekburys/csmith,DmitryOlshansky/dsmith,DmitryOlshansky/dsmith,DmitryOlshansky/dsmith,jacekburys/csmith,Panos90/csmith,natgla/csmith,jacekburys/csmith,Panos90/csmith,Panos90/csmith,natgla/csmith,natgla/csmith,jacekburys/csmith