Remove excessive "" in "{" maping

jsfuck.js

@@ -106,7 +106,7 @@
     '^':   USE_CHAR_CODE,
     '_':   USE_CHAR_CODE,
     '`':   USE_CHAR_CODE,
-    '{':   '(NaN+[]["filter"]+"")[21]',
+    '{':   '(NaN+[]["filter"])[21]',
     '|':   USE_CHAR_CODE,
     '}':   USE_CHAR_CODE,
     '~':   USE_CHAR_CODE

output.txt

@@ -89,6 +89,6 @@
 `x` 2298
 `y` 106
 `z` 2318
-`{` 197
+`{` 194
 `|` 13402
 `}` 13244