backticks: remove workaround for simple-tokenizer bug.

extra/backticks/backticks.factor

@@ -1,10 +1,9 @@
 ! Copyright (C) 2015 John Benediktsson
 ! See http://factorcode.org/license.txt for BSD license
-USING: fry io io.encodings.utf8 io.launcher multiline sequences
-unicode.categories ;
+USING: fry io io.encodings.utf8 io.launcher multiline sequences ;
 IN: backticks
 
 SYNTAX: `
-    "`" parse-multiline-string [ blank? ] trim
+    "`" parse-multiline-string
     '[ _ utf8 [ contents ] with-process-reader ]
     append! ;