Not compatible to Chef 13+

[horazont]

With chefdk 2.6, chef fails to compile this cookbook:

       ================================================================================
       Recipe Compile Error in /tmp/kitchen/cache/cookbooks/ceph-chef/providers/README.md
       ================================================================================
       
       SyntaxError
       -----------
       /tmp/kitchen/cache/cookbooks/ceph-chef/providers/README.md:3: syntax error, unexpected tIDENTIFIER, expecting keyword_do or '{' or '('
       k. It allows for easy creation, setting and deleting of pool
                              ^
       /tmp/kitchen/cache/cookbooks/ceph-chef/providers/README.md:3: syntax error, unexpected keyword_and, expecting '='
       for easy creation, setting and deleting of pools. It allows 
                              ^
       /tmp/kitchen/cache/cookbooks/ceph-chef/providers/README.md:3: syntax error, unexpected tIDENTIFIER, expecting keyword_do or '{' or '('
        It allows for setting replica size and types such as replic
                              ^
       /tmp/kitchen/cache/cookbooks/ceph-chef/providers/README.md:5: syntax error, unexpected tINTEGER, expecting '('
       2. client.rb
        ^
       /tmp/kitchen/cache/cookbooks/ceph-chef/providers/README.md:6: syntax error, unexpected tIDENTIFIER, expecting keyword_do or '{' or '('
       der allows for simple creation of basic ceph clients such as
                              ^
       /tmp/kitchen/cache/cookbooks/ceph-chef/providers/README.md:6: unterminated string meets end of file
       
       System Info:
       ------------
       chef_version=13.11.3
       platform=ubuntu
       platform_version=16.04
       ruby=ruby 2.4.4p296 (2018-03-28 revision 63013) [x86_64-linux]
       program_name=chef-client worker: ppid=12482;start=08:58:04;
       executable=/opt/chef/bin/chef-client

Apparently, it tries to parse the README.md as ruby file…

[horazont]

When deleting those files, other Chef 13+ issues come up. Renaming this issue for general chef 13+ compat.