Revert "Fix build error"

This reverts commit 90738e1ece.

flutter_quill_extensions/lib/embeds/formula/toolbar/formula_button.dart

@@ -94,6 +94,7 @@ class QuillToolbarFormulaButton extends StatelessWidget {
       icon: Icon(iconData, size: iconSize * iconButtonFactor, color: iconColor),
       tooltip: tooltip,
       onPressed: () => _sharedOnPressed(context),
+      isFilled: false,
     );
   }
 

flutter_quill_extensions/lib/embeds/image/toolbar/image_button.dart

@@ -103,6 +103,7 @@ class QuillToolbarImageButton extends StatelessWidget {
     final iconColor = iconTheme?.iconUnselectedColor ?? theme.iconTheme.color;
 
     return QuillToolbarIconButton(
+      isFilled: false,
       icon: Icon(
         iconData,
         size: iconButtonFactor * iconSize,

flutter_quill_extensions/lib/embeds/others/camera_button/camera_button.dart

@@ -106,6 +106,7 @@ class QuillToolbarCameraButton extends StatelessWidget {
     final iconColor = iconTheme?.iconUnselectedColor ?? theme.iconTheme.color;
 
     return QuillToolbarIconButton(
+      isFilled: false,
       icon: Icon(iconData, size: iconButtonFactor * iconSize, color: iconColor),
       tooltip: tooltip,
       onPressed: () => _sharedOnPressed(context),

flutter_quill_extensions/lib/embeds/video/toolbar/video_button.dart

@@ -109,6 +109,7 @@ class QuillToolbarVideoButton extends StatelessWidget {
       icon: Icon(iconData, size: iconSize * iconButtonFactor, color: iconColor),
       tooltip: tooltip,
       onPressed: () => _sharedOnPressed(context),
+      isFilled: false,
     );
   }