remove date from core, app_wasm.html

src/app/app_wasm.c

@@ -36,6 +36,7 @@ while (true) {
 }
 
 */
+fn_wasm_import f64  wasm_get_milliseconds(void);
 
 gb_wasm_export char wasm_temp_buff1[128] = {[127] = 0x13};
 gb_wasm_export i32  wasm_temp_buff1_len  = 127;