Remove old hacks and fix typos

scripts/.local/share/scripts/subject

@@ -1,7 +1,7 @@
 #!/bin/sh
 
 if [ $# -lt 2 ]; then
-	echo "Usage: subject.sh <subject name> <subject type>"
+	echo "Usage: subject <subject name> <subject type>"
 	echo "subject type 0: programming"
 	echo "subject type 1: no programming"
 	exit 1