Remove deprecated flag (PR review)

Author: dmitrylyzo

Makefile

@@ -4,7 +4,7 @@
 BASE_DIR:=$(dir $(realpath $(firstword $(MAKEFILE_LIST))))
 DIST_DIR:=$(BASE_DIR)dist/libraries
 
-GLOBAL_CFLAGS:=-O3 -s ENVIRONMENT=web,webview -s DOUBLE_MODE=0
+GLOBAL_CFLAGS:=-O3 -s ENVIRONMENT=web,webview
 
 all: subtitleoctopus