Remove mixed-line-ending hook

I suspect it may modify files.

Author: mhucka

.pre-commit-config.yaml

@@ -89,9 +89,6 @@ repos:
       - id: check-xml
         name: 'Check XML files for valid syntax'
 
-      - id: mixed-line-ending
-        name: "Check files don't contain mixed line endings"
-
   - repo: https://github.com/adrienverge/yamllint
     rev: cba56bcde1fdd01c1deb3f945e69764c291a6530  # frozen: v1.38.0
     hooks: