fix transform assert (#31568)

* fix transform assert

packages/flutter/lib/src/painting/matrix_utils.dart

@@ -163,7 +163,10 @@ class MatrixUtils {
   /// 0.0 before computing its bounding rect.
   static Rect inverseTransformRect(Matrix4 transform, Rect rect) {
     assert(rect != null);
-    assert(transform.determinant != 0.0);
+    // As exposed by `unrelated_type_equality_checks`, this assert was a no-op.
+    // Fixing it introduces a bunch of runtime failures; for more context see:
+    // https://github.com/flutter/flutter/pull/31568
+    // assert(transform.determinant != 0.0);
     if (isIdentity(transform))
       return rect;
     transform = Matrix4.copy(transform)..invert();