Drop now unneeded FILESDIR and S variables from various recipes

meta/packages/gdb/gdb-common.inc

@@ -9,8 +9,6 @@ inherit autotools
 SRC_URI = "${GNU_MIRROR}/gdb/gdb-${PV}.tar.gz \
            file://no-werror.patch;patch=1"
 
-FILESDIR = "${@os.path.dirname(bb.data.getVar('FILE',d,1))}/gdb-${PV}"
-
 export CC_FOR_BUILD = "${BUILD_CC}"
 export CXX_FOR_BUILD = "${BUILD_CXX}"
 export CPP_FOR_BUILD = "${BUILD_CPP}"
@@ -18,6 +16,5 @@ export CFLAGS_FOR_BUILD = "${BUILD_CFLAGS}"
 export CXXFLAGS_FOR_BUILD = "${BUILD_CXXFLAGS}"
 export CPPFLAGS_FOR_BUILD = "${BUILD_CPPFLAGS}"
 
-S = "${WORKDIR}/gdb-${PV}"
 B = "${WORKDIR}/build-${TARGET_SYS}"