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diff --git a/usr.bin/learn/lib/eqn/L10.1b b/usr.bin/learn/lib/eqn/L10.1b
deleted file mode 100644
index 5b5c3896a9e..00000000000
--- a/usr.bin/learn/lib/eqn/L10.1b
+++ /dev/null
@@ -1,42 +0,0 @@
-#print
-More practice with mark and lineup.
-Modify "Example" so the + signs are lined up in
-all of the equations, then type "ready".
-#once #create Ref
-.LP
-.EQ I
-x ~==~ a sub i ~ mark + ~ b sub i ~-~ c sub i
-.EN
-.EQ I
-lineup + ~ d sub i - e sub i
-.EN
-.EQ I
-lineup + ~ f sub i - g sub i
-.EN
-.EQ I
-lineup + ~ ...
-.EN
-.pl 1
-#once #create Example
-.LP
-.EQ I
-x ~==~ a sub i ~ + ~ b sub i ~-~ c sub i
-.EN
-.EQ I
-+ ~ d sub i - e sub i
-.EN
-.EQ I
-+ ~ f sub i - g sub i
-.EN
-.EQ I
-+ ~ ...
-.EN
-.pl 1
-#
-#once neqn Ref | nroff >X1 &
-#user
-neqn Example | nroff >X2
-#cmp X1 X2
-#log
-#next
-10.1c 10