disable text rendering mesh cache

Runtime/ui/painting/txt/mesh_generator.cs

             var subText = textBlob.text.Substring(textBlob.start, textBlob.end - textBlob.start);
             font.RequestCharactersInTexture(subText, fontSizeToLoad, style.UnityFontStyle);
             
+            /*
+            
-            }
+            }*/
 
             var vertices = new List<Vector3>(length * 4);
             var triangles = new List<int>(length * 6);
 
              
             MeshMesh mesh = new MeshMesh(vertices, triangles, uv);
-            _meshes[key] = new MeshInfo(key, mesh);
+            // _meshes[key] = new MeshInfo(key, mesh);
             
             return mesh;
         }