Add script to delete not utf8 java files and run it

[timur-harin]

@yegor256
In issue 169 you mentioned that you should delete not UTF8 source Java files

I think that we need also to have this script with showing which files were deleted which I put in the help folder

[yegor256]

@timur-harin good start, but all filters we keep in the filters/ directory. Try to make a copy of an existing one, for example 040-delete-unparseable.sh. Then, make a test for your script, again using tests/filters/test-040-delete-unparseable.sh as example.

[yegor256]

@timur-harin also, when your branch is ready, run make test

[timur-harin]

@yegor256 are you talking about changing a file 040-delete-unparseable.sh or creating a new one?
If about new one, which number I can take in the start of the file name of script?

[yegor256]

@timur-harin make a new one and call it 041-delete-non-unicode.sh

[timur-harin]

@yegor256 I added a test and moved the script

[yegor256]

@timur-harin looks like you delete ALL files, not only files with a broken encoding inside :)

[yegor256]

@timur-harin why did you delete files from the fixtures/ directory? I believe, we need them.

[timur-harin]

@yegor256, in issue there is "delete non-UTF8 source Java files"
I understood that like

files that make up a project. They contain the code written by the developers and are used to build the final executable or deployable software

So I had to delete not UTF8 Java files in project

[timur-harin]

@yegor256 If I am not right, correct me

[yegor256]

@timur-harin the objective of this filter is to delete files that have wrong encoding inside, which is not UTF-8 and not ASCII

[yegor256]

@timur-harin it was implemented in #285