-K flag should be dropped now

When I create an executable ruby script with -K option and run it, I get the following warning.

/usr/bin/ruby: warning: -K is specified; it is for 1.8 compatibility and may cause odd behavior

I am using ruby 2.1.2p95
Merge pull request #40 from amitavmohanty01/patch-1

-K flag should be dropped now