media-libs/libogg: find and remove '*.a' not required

media-libs/libogg: find and remove '*.a' not required

Not sure if this was changed in a previous version of libogg, but
libogg-1.3.3 correctly respects --enable-static/--disable-static, and
does not produce a static library when built with USE=-static-libs.

The find "${ED}" -name '*.a' -delete || die line also kills off
libogg.dll.a, which is needed for shared linking on mingw-w64, so
it should be removed as uneeded and harmful.

Package-Manager: Portage-2.3.19, Repoman-2.3.6
Signed-off-by: Marty E. Plummer <hanetzer@protonmail.com>