Make 'module' a context-sensitive keyword.

src/scanner.cc

Index: src/scanner.cc
diff --git a/src/scanner.cc b/src/scanner.cc
index 42a1c2bc31e93cd0cd859d1fc461bb03b9732585..72768b381b4b085e5a0281093b44b76b92a38b31 100755
--- a/src/scanner.cc
+++ b/src/scanner.cc
@@ -850,9 +850,6 @@ uc32 Scanner::ScanIdentifierUnicodeEscape() {
   KEYWORD_GROUP('l')                                                \
   KEYWORD("let", harmony_scoping                                    \
                  ? Token::LET : Token::FUTURE_STRICT_RESERVED_WORD) \
-  KEYWORD_GROUP('m')                                                \
-  KEYWORD("module", harmony_modules                                 \
-                    ? Token::MODULE : Token::IDENTIFIER)            \
   KEYWORD_GROUP('n')                                                \
   KEYWORD("new", Token::NEW)                                        \
   KEYWORD("null", Token::NULL_LITERAL)                              \