tan: Use unary_decl instead of custom inc file

Signed-off-by: Jan Vesely <jan.vesely@rutgers.edu>
Reviewed-By: Aaron Watry <awatry@gmail.com>
llvm-svn: 317258
GitOrigin-RevId: e4d5d10076229e6f6dbfa106f7881b89de8b2048
2 files changed