tools/doccheck: add simple exclude to doccheck

uniq and sorted simple excludes
removes no longer needed exclude patterns

dist/tools/doccheck/check.sh

@@ -12,6 +12,7 @@
 # shellcheck disable=SC2164
 SCRIPTDIR="$(cd "$(dirname "$0")"; pwd)"
 RIOTBASE="$(cd "${SCRIPTDIR}"/../../..; pwd)"
+EXCLUDE_SIMPLE_FILE="${SCRIPTDIR}/exclude_simple"
 EXCLUDE_PATTERN_FILE="${SCRIPTDIR}/exclude_patterns"
 GENERIC_EXCLUDE_PATTERN_FILE="${SCRIPTDIR}/generic_exclude_patterns"
 
@@ -32,8 +33,8 @@ else
     CWARN=
     CRESET=
 fi
-
-DOXY_OUTPUT=$(make -C "${RIOTBASE}" doc 2>&1 | grep -Evf "${EXCLUDE_PATTERN_FILE}" -f"${GENERIC_EXCLUDE_PATTERN_FILE}")
+DOXY_OUTPUT=$(make -C "${RIOTBASE}" doc 2>&1| grep -Fvf "${EXCLUDE_SIMPLE_FILE}" )
+DOXY_OUTPUT=$(echo "${DOXY_OUTPUT}" | grep -Evf "${EXCLUDE_PATTERN_FILE}" | grep -Evf "${GENERIC_EXCLUDE_PATTERN_FILE}")
 DOXY_ERRCODE=$?
 RESULT=0