Revert "Update Malayalam fonts"

This reverts commit d546f6e71fb3b402b050a77636c13ce130300bbd.
Noted line height variations between WOFF and WOFF2.
Reverting till we investigate this
Similar to https://gerrit.wikimedia.org/r/#/c/174081/

Change-Id: I31e1a2dfe643fcd979953acc5cb6f93e872a2a87