(CAT-1618) - Remove unncessary filter for code cov

Remove the filter for gitignored files. Code coverage will update as per
the diff, which naturally does not include files in .gitignore

spec/spec_helper.rb

@@ -19,14 +19,6 @@
     add_filter '/.vendor'
     add_filter '/docs'
     add_filter '/lib/pdk/version.rb'
-
-    # do not track gitignored files
-    # this adds about 4 seconds to the coverage check
-    # this could definitely be optimized
-    add_filter do |f|
-      # system returns true if exit status is 0, which with git-check-ignore means file is ignored
-      system("git check-ignore --quiet #{f.filename}")
-    end
   end
 end