Magisk Update checker use prefs listener

app/src/main/java/com/topjohnwu/magisk/module/Module.java

@@ -8,7 +8,7 @@ public class Module extends BaseModule {
 
     private String mRemoveFile;
     private String mDisableFile;
-    private boolean mEnable, mRemove, mUpdateAvailable = false;
+    private boolean mEnable, mRemove;
 
     public Module(String path) {
 
@@ -38,7 +38,7 @@ public class Module extends BaseModule {
             repo.setInstalled();
             if (repo.getVersionCode() > mVersionCode) {
                 repo.setUpdate();
-                mUpdateAvailable = true;
+                mCanUpdate = true;
             }
         }
     }
@@ -67,6 +67,4 @@ public class Module extends BaseModule {
         return mRemove;
     }
 
-    public boolean isUpdateAvailable() { return mUpdateAvailable; }
-
 }