cosmetic/make: remove comment with unused flags

They appear to have been commented out since the first public release
and it's not clear what they were intended for or if they'd even still
work with current emscripten.

Cherry-picked from: libass@4370e7b

Author: TheOneric

Makefile

@@ -169,10 +169,6 @@ EMCC_COMMON_ARGS = \
 	-s NO_FILESYSTEM=0 \
 	--no-heap-copy \
 	-o $@
-	#--js-opts 0 -g4 \
-	#--closure 1 \
-	#--memory-init-file 0 \
-	#-s OUTLINING_LIMIT=20000 \
 
 dist: src/subtitles-octopus-worker.bc dist/js/subtitles-octopus-worker.js dist/js/subtitles-octopus-worker-legacy.js dist/js/subtitles-octopus.js dist/js/COPYRIGHT