Remove terrible Perl translation-diff script.

tools/missing-translation-keys.sh

@@ -0,0 +1,22 @@
+# usage: missing-translation-keys.sh nl_nl
+
+if [ $# -ne 1 ]; then
+    echo "missing language to compare with"
+    exit
+fi
+
+filename=src/main/resources/assets/refinedstorage/lang/$1.lang
+
+if [ ! -f $filename ]; then
+    echo "$filename not found"
+    exit
+fi
+
+BASE_LANG="en_us"
+
+cat src/main/resources/assets/refinedstorage/lang/$BASE_LANG.lang | cut -d "=" -f 1 > a.lang
+cat $filename | cut -d "=" -f 1 > b.lang
+
+diff -s -y a.lang b.lang
+
+rm a.lang b.lang