Remove empty new line at the beginning of Ruby source files

Dunno why I did that.

Author: chadowo

src/blocks/main.rb

@@ -1,4 +1,3 @@
-
 method_with_block do
   puts 'This block will be called three times!'
 end

src/hello-file/main.rb

@@ -1,4 +1,3 @@
-
 5.times do
   puts 'Hello from a ruby file!'
 end