Remove blank line that made my erblint unhappy

[drnic]

My app's erblint-ing was also looking into .erb files in node_modules and found something that made it unhappy.

Before PR:

$ erblint --lint-all --enable-linters space_around_erb_tag,extra_newline
.erb-lint.yml not found: using default config
Linting 70 files with 2 linters...

Extra blank line detected.
In file: test/dummy/app/views/frames/increment/button_in_frame.html.erb:37

1 error(s) were found in ERB files

After:

erblint --lint-all --enable-linters space_around_erb_tag,extra_newline
.erb-lint.yml not found: using default config
Linting 70 files with 2 linters...

No errors were found in ERB files