opt supported encoding update, consider multi connections (#7978)

Signed-off-by: 21pages <pages21@163.com>

libs/scrap/src/common/vram.rs

@@ -6,7 +6,7 @@ use std::{
 
 use crate::{
     codec::{base_bitrate, enable_vram_option, EncoderApi, EncoderCfg, Quality},
-    AdapterDevice, CodecFormat, CodecName, EncodeInput, EncodeYuvFormat, Pixfmt,
+    AdapterDevice, CodecFormat, EncodeInput, EncodeYuvFormat, Pixfmt,
 };
 use hbb_common::{
     anyhow::{anyhow, bail, Context},
@@ -284,10 +284,6 @@ impl VRamEncoder {
         log::info!("set display#{display} not use vram encode to {not_use}");
         ENOCDE_NOT_USE.lock().unwrap().insert(display, not_use);
     }
-
-    pub fn not_use() -> bool {
-        ENOCDE_NOT_USE.lock().unwrap().iter().any(|v| *v.1)
-    }
 }
 
 pub struct VRamDecoder {