[emscripten] Remove some redundant emcc flags

Split out from #7984.

Author: sbc100

CMakeLists.txt

@@ -346,7 +346,6 @@ if(EMSCRIPTEN)
     add_link_flag("-sENVIRONMENT=web,worker")
     add_link_flag("-sINVOKE_RUN=0")
     add_link_flag("-sEXPORTED_RUNTIME_METHODS=run,callMain,FS")
-    add_link_flag("-sMODULARIZE")
     add_link_flag("-sEXPORT_ES6")
     add_link_flag("-sFILESYSTEM")
     add_link_flag("-sFORCE_FILESYSTEM")
@@ -359,7 +358,7 @@ if(EMSCRIPTEN)
     add_nondebug_compile_flag("-flto")
   endif()
   if(EMSCRIPTEN_ENABLE_WASM64)
-    add_compile_flag("-sMEMORY64 -Wno-experimental")
+    add_compile_flag("-sMEMORY64")
     add_link_flag("-sMEMORY64")
   endif()
 endif()