Revert "Exclude FunctionsConversion from the large objects check for now"

This reverts commit 7261f924bb.

utils/check-style/check-large-objects.sh

@@ -7,8 +7,6 @@ export LC_ALL=C # The "total" should be printed without localization
 TU_EXCLUDES=(
     AggregateFunctionUniq
     Aggregator
-    # FIXME: Exclude for now
-    FunctionsConversion
 )
 
 if find $1 -name '*.o' | xargs wc -c | grep --regexp='\.o$' | sort -rn | awk '{ if ($1 > 50000000) print }' \