remove unused import

Author: topi-banana

src/main/java/com/vulpeus/kyoyu/client/mixins/litematica/SchematicPlacementMixin.java

@@ -21,7 +21,6 @@
 import net.minecraft.client.player.LocalPlayer;
 import net.minecraft.core.BlockPos;
 import org.spongepowered.asm.mixin.Mixin;
-import org.spongepowered.asm.mixin.Shadow;
 import org.spongepowered.asm.mixin.Unique;
 import org.spongepowered.asm.mixin.injection.At;
 import org.spongepowered.asm.mixin.injection.Inject;