Remove 2OVER and 2SWAP

They were unused.

blk.fs

@@ -1840,8 +1840,6 @@ SYSVARS 0x0c + :** C<*
     1+ DUP PICK          ( n val )
     SWAP 2 * (roll)      ( val )
     NIP ;
-: 2OVER 3 PICK 3 PICK ;
-: 2SWAP 3 ROLL 3 ROLL ;
 ( ----- 367 )
 : MOVE ( a1 a2 u -- )
     ?DUP IF ( u ) 0 DO ( a1 a2 )

doc/dict.txt

@@ -129,8 +129,6 @@ SWAP        a b -- b a
 TUCK        a b -- b a b
 2DROP       a a --
 2DUP        a b -- a b a b
-2OVER       a b c d -- a b c d a b
-2SWAP       a b c d -- c d a b
 'S          Returns current stack pointer, not counting the
             push it's making right now.
 S0          Returns address of PSP TOS. When PSP is empty,