Do not prepend the "eslint-env" directive to lib/parser.js

The lib/parser.js file is a CommonJS module like all the other files in
lib/, so setting the environment explicitly is not needed. Besides, the
environment set by "eslint-env" was wrong (since transitioning from the
AMD format).

Makefile

@@ -54,7 +54,6 @@ parser:
 
 	rm -f $(PARSER_OUT_FILE)
 
-	echo '/* eslint-env node, amd */'          >> $(PARSER_OUT_FILE)
 	echo '/* eslint-disable no-unused-vars */' >> $(PARSER_OUT_FILE)
 	echo                                       >> $(PARSER_OUT_FILE)
 	cat $(PARSER_OUT_FILE_NEW)                 >> $(PARSER_OUT_FILE)

lib/parser.js

@@ -1,4 +1,3 @@
-/* eslint-env node, amd */
 /* eslint-disable no-unused-vars */
 
 // Generated by PEG.js 0.10.0.