meta: Drop further remnants of uclibc support

uclibc support was removed a while ago and musl works much better. Start to
remove the various overrides and patches related to uclibc which are no longer
needed.

uclibc support in a layer would still be possible. I have strong reasons to
believe nobody is still using uclibc since patches are missing and I doubt
the metadata even parses anymore.

(From OE-Core rev: ec03023d2165b49a52b83bac1ea2f0bfded7b852)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-kernel/perf/perf.bb

@@ -10,8 +10,6 @@ LICENSE = "GPLv2"
 
 PR = "r9"
 
-BUILDPERF_libc-uclibc = "no"
-
 PACKAGECONFIG ??= "scripting tui libunwind"
 PACKAGECONFIG[scripting] = ",NO_LIBPERL=1 NO_LIBPYTHON=1,perl python"
 # gui support was added with kernel 3.6.35

meta/recipes-kernel/powertop/powertop_2.8.bb

@@ -17,11 +17,6 @@ UPSTREAM_CHECK_URI = "https://01.org/powertop/downloads"
 
 inherit autotools gettext pkgconfig
 
-# we need to explicitly link with libintl in uClibc systems
-EXTRA_LDFLAGS ?= ""
-EXTRA_LDFLAGS_libc-uclibc = "-lintl"
-LDFLAGS += "${EXTRA_LDFLAGS}"
-
 # we do not want libncursesw if we can
 do_configure_prepend() {
     # configure.ac checks for delwin() in "ncursesw ncurses" so let's drop first one