[PATCH] D29877: Warn about unused static file scope function template declarations.

[Vassil Vassilev via Phabricator via cfe-commits]

v.g.vassilev planned changes to this revision.
v.g.vassilev added a comment.

We agreed to implement a special switch for this, eg. `-Wunused-template`


https://reviews.llvm.org/D29877