Remove useless fibonacci function and comments from ruby solution for problem 2
Remove useless fibonacci function and comments from ruby solution for problem 2

mdsrosa/project_euler,mdsrosa/project_euler,mdsrosa/project_euler,mdsrosa/project_euler,mdsrosa/project_euler,mdsrosa/project_euler,mdsrosa/project_euler,mdsrosa/project_euler