remove plaintext.yml from version control that was mistankenly checked in

config/plaintext.yml

@@ -1,38 +0,0 @@
-# Text extraction helper programs.
-#
-# commands should write the resulting plain text to STDOUT. Use __FILE__ as
-# placeholder for the file path. The values below are the defaults.
-# apt install poppler-utils
-pdftotext:
- - /usr/local/bin/pdftotext
- - -enc
- - UTF-8
- - __FILE__
- - '-'
-
-# apt install unrtf
-unrtf:
-  - /usr/local/bin/unrtf
-  - --text
-  - __FILE__
-
-tesseract:
-  - /usr/local/bin/tesseract
-  - __FILE__
-  - stdout
-
-# apt install catdoc
-catdoc:
-  - /usr/bin/textutil
-  - -convert
-  - txt
-  - -stdout
-  - __FILE__
-# xls2csv:
-#   - /usr/bin/xls2csv
-#   - -dutf-8
-#   - __FILE__
-# catppt:
-#   - /usr/bin/catppt
-#   - -dutf-8
-#   - __FILE__