delete stack.h
delete stack.h

opensourceDA/CLRS,tushar2708/CLRS,tushar2708/CLRS,opensourceDA/CLRS,Mooophy/CLRS,tushar2708/CLRS,opensourceDA/CLRS,Mooophy/CLRS,opensourceDA/CLRS,Mooophy/CLRS,Mooophy/CLRS,tushar2708/CLRS