Lint fix

Summary: whynot

Reviewed By: strulovich

Differential Revision: D19252069

fbshipit-source-id: f2ab37be6b8cf4ce3abc03f7177b60f2da332392
diff --git a/core/src/main/java/com/facebook/ktfmt/KotlinInputAstVisitor.kt b/core/src/main/java/com/facebook/ktfmt/KotlinInputAstVisitor.kt
index 7da1f16..1dec3ba 100644
--- a/core/src/main/java/com/facebook/ktfmt/KotlinInputAstVisitor.kt
+++ b/core/src/main/java/com/facebook/ktfmt/KotlinInputAstVisitor.kt
@@ -22,6 +22,7 @@
 import com.google.googlejavaformat.Output
 import com.intellij.psi.PsiElement
 import com.intellij.psi.PsiWhiteSpace
+import java.util.ArrayDeque
 import java.util.Optional
 import org.jetbrains.kotlin.lexer.KtModifierKeywordToken
 import org.jetbrains.kotlin.lexer.KtTokens
@@ -109,7 +110,6 @@
 import org.jetbrains.kotlin.psi.psiUtil.startOffset
 import org.jetbrains.kotlin.psi.stubs.elements.KtAnnotationEntryElementType
 import org.jetbrains.kotlin.types.Variance
-import java.util.ArrayDeque
 
 /**
  * An AST visitor that builds a stream of {@link Op}s to format.