Fix some compile warnings

remove flatDir

V2rayNG/app/build.gradle

@@ -71,7 +71,7 @@ android {
 }
 
 dependencies {
-    implementation fileTree(include: ['*.jar'], dir: 'libs')
+    implementation fileTree(dir: 'libs', include: ['*.aar', '*.jar'], exclude: [])
     testImplementation 'junit:junit:4.13'
 
     // Androidx
@@ -106,8 +106,6 @@ dependencies {
     implementation 'me.drakeet.support:toastcompat:1.1.0'
     implementation 'com.blacksquircle.ui:editorkit:2.0.0'
     implementation 'com.blacksquircle.ui:language-json:2.0.0'
-
-    implementation(name: 'libv2ray', ext: 'aar')
 }
 
 buildscript {
@@ -120,8 +118,3 @@ buildscript {
         classpath "org.jetbrains.kotlin:kotlin-android-extensions:$kotlinVersion"
     }
 }
-repositories {
-    flatDir {
-        dirs 'libs'
-    }
-}