chore: make pub.dev happy

thermion_dart/lib/src/input/src/delegate_gesture_handler.dart

@@ -134,6 +134,7 @@ class DelegateInputHandler implements InputHandler {
           break;
       }
 
+      // ignore: unnecessary_null_comparison
       if (keyType != null) {
         keyAction = _actions[keyType];
 

thermion_dart/lib/src/input/src/implementations/fixed_orbit_camera_rotation_delegate.dart

@@ -4,7 +4,6 @@ import '../../../viewer/src/shared_types/camera.dart';
 import '../../../viewer/viewer.dart';
 import '../../input.dart';
 import '../input_handler.dart';
-import 'dart:math';
 
 class FixedOrbitRotateInputHandlerDelegate implements InputHandlerDelegate {
   final ThermionViewer viewer;
@@ -46,7 +45,7 @@ class FixedOrbitRotateInputHandlerDelegate implements InputHandlerDelegate {
         _queuedRotationDelta += Vector2(delta.x, delta.y);
         break;
       case InputAction.TRANSLATE:
-        _queuedZoomDelta += delta!.z;
+        _queuedZoomDelta += delta.z;
         break;
       case InputAction.PICK:
         // Assuming PICK is used for zoom in this context

thermion_dart/lib/src/viewer/src/web_wasm/src/camera.dart

@@ -1,6 +1,5 @@
 import 'package:vector_math/vector_math_64.dart';
 
-import '../../shared_types/camera.dart';
 import '../../thermion_viewer_base.dart';
 
 class ThermionWasmCamera extends Camera {