Bug 1563903 - Remove libmar from the clang ignore list r=Ehsan

Differential Revision: https://phabricator.services.mozilla.com/D37152

--HG--
extra : moz-landing-system : lando

.clang-format-ignore

@@ -146,7 +146,6 @@ modules/brotli/.*
 modules/fdlibm/.*
 modules/freetype2/.*
 modules/libbz2/.*
-modules/libmar/.*
 modules/pdfium/.*
 modules/woff2/.*
 modules/xz-embedded/.*