Bug 1467797 - libmar isn't thirdparty code, remove it from the thirdp…

…arty list r=Ehsan

MozReview-Commit-ID: OJZJJJvZ8Y

--HG--
extra : rebase_source : 8afa2a2d8b990fba8ca1ebc6f31f7fea4e8af391

tools/rewriting/ThirdPartyPaths.txt

@@ -66,7 +66,6 @@ mobile/android/thirdparty/
 modules/brotli/
 modules/fdlibm/
 modules/freetype2/
-modules/libmar/
 modules/pdfium/
 modules/woff2/
 modules/xz-embedded/