dev-libs/imath: drop dead prefix targets

The removal was already done, so this is just cleanup afterwards.

Signed-off-by: Sam James <[email protected]>

dev-libs/imath/imath-3.1.7.ebuild

@@ -12,7 +12,7 @@ MY_PN="${PN^}"
 DESCRIPTION="Imath basic math package"
 HOMEPAGE="https://imath.readthedocs.io"
 SRC_URI="https://github.com/AcademySoftwareFoundation/${MY_PN}/archive/refs/tags/v${PV}.tar.gz -> ${P}.tar.gz"
-# re-keywording needed for (according to ilmbase keywords): ~x64-macos ~x86-solaris
+# re-keywording needed for (according to ilmbase keywords): ~x64-macos
 KEYWORDS="amd64 ~arm arm64 ~hppa ~ia64 ~loong ~mips ~ppc ~ppc64 ~riscv ~sparc x86 ~amd64-linux ~x86-linux"
 S="${WORKDIR}/${MY_PN}-${PV}"