Remove unnecessary legacy-support-v4 dependency

app/build.gradle

@@ -108,7 +108,6 @@ dependencies {
     implementation 'com.github.inorichi:junrar-android:634c1f5'
 
     // Android support library
-    implementation 'androidx.legacy:legacy-support-v4:1.0.0'
     implementation 'androidx.appcompat:appcompat:1.1.0'
     implementation 'androidx.cardview:cardview:1.0.0'
     implementation 'com.google.android.material:material:1.0.0'