home: git: remove 'ignoreRevsFile'

I remember why I didn't set it globally now, it's because `git blame`
complains and errors out, rather than silently ignoring the setting,
when the file doesn't exist in a repo...

This reverts commit 5ae2eacd49.

modules/home/git/default.nix

@@ -75,7 +75,6 @@ in
       # Makes it a bit more readable
       blame = {
         coloring = "repeatedLines";
-        ignoreRevsFile = ".git-blame-ignore-revs";
         markIgnoredLines = true;
         markUnblamables = true;
       };