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-rw-r--r--chapter04/docs/04-grammar.md2
1 files changed, 0 insertions, 2 deletions
diff --git a/chapter04/docs/04-grammar.md b/chapter04/docs/04-grammar.md
index eca2e649..51d5dbea 100644
--- a/chapter04/docs/04-grammar.md
+++ b/chapter04/docs/04-grammar.md
@@ -59,8 +59,6 @@ unaryExpression
primaryExpression
: IDENTIFIER
| INTEGER_LITERAL
- | 'true'
- | 'false'
| '(' expression ')'
;