Remove empty file "hello.txt"

[kunal2812]

There is an empty file in the repo "hello.txt". Remove it.

Note:

• Create a new branch for every task to isolate changes
• Start working on the issue only when it is assigned to you
• Submit the PR on time, no extra time will be allotted

[tmatheas]

@kunal2812 Can you assign the issue to me ? Also can you add Hacktoberfest label to the issue ?

[Aqua-16]

@kunal2812 Sir could you also please verify the submission on ContriHub as well, that would be great.