Remove use-native-renames flag for ImportIt

Summary: This flag is always set now, so we don't need it (less things to translate to CodeSync)

Reviewed By: jailby

Differential Revision: D45283010

fbshipit-source-id: 1bcda581d20fad4ea79218fc1b281a1f09b1029d

src/importit/phase/ImportItSyncPhase.php

@@ -29,7 +29,6 @@ final class ImportItSyncPhase extends \Facebook\ShipIt\ShipItPhase {
   private bool $applyToLatest = false;
   private ?string $applyToTarget = null;
   private bool $shouldDoSubmodules = true;
-  private bool $nativeRenames = false;
 
   public function __construct(
     private (function(ShipItChangeset): ShipItChangeset) $filter,
@@ -116,15 +115,6 @@ final public function getCLIArguments(
           return $this->shouldDoSubmodules;
         },
       ),
-      shape(
-        'long_name' => 'native-renames',
-        'description' =>
-          'Use native renames instead of deleting and adding files',
-        'write' => $_ ==> {
-          $this->nativeRenames = true;
-          return $this->nativeRenames;
-        },
-      ),
     ];
   }
 
@@ -167,9 +157,7 @@ final public function getCLIArguments(
       $manifest->getSourcePath(),
     );
     await $source_repo->genSetBranch($manifest->getSourceBranch());
-    if ($this->nativeRenames) {
-      $source_repo->setUseNativeRenames(true);
-    }
+    $source_repo->setUseNativeRenames(true);
     return await $source_repo->genChangesetAndBaseRevisionForPullRequest(
       $pr_number,
       $expected_head_rev,