Don't exclude same source when checking for duplicate entries

Closes #8870

(cherry picked from commit a0f47d3f1b874c9b6d62dfc1679daa9398bf9b98)

# Conflicts:
#	app/src/main/java/eu/kanade/tachiyomi/ui/browse/source/browse/BrowseSourceScreenModel.kt

app/src/main/java/eu/kanade/presentation/components/DuplicateMangaDialog.kt

@@ -9,14 +9,12 @@ import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.res.stringResource
 import eu.kanade.tachiyomi.R
-import eu.kanade.tachiyomi.source.Source
 
 @Composable
 fun DuplicateMangaDialog(
     onDismissRequest: () -> Unit,
     onConfirm: () -> Unit,
     onOpenManga: () -> Unit,
-    duplicateFrom: Source,
 ) {
     AlertDialog(
         onDismissRequest = onDismissRequest,
@@ -46,12 +44,7 @@ fun DuplicateMangaDialog(
             Text(text = stringResource(R.string.are_you_sure))
         },
         text = {
-            Text(
-                text = stringResource(
-                    id = R.string.confirm_manga_add_duplicate,
-                    duplicateFrom.name,
-                ),
-            )
+            Text(text = stringResource(R.string.confirm_add_duplicate_manga))
         },
     )
 }