Remove deprecated code

.github/workflows/build-release.yml

@@ -52,7 +52,6 @@ jobs:
       - name: "Validate Flow PHAR"
         run: |
           ./build/flow.phar --version
-          ./build/flow.phar run examples/topics/phar/data_frame/code.php
 
       - name: "Import GPG Key"
         uses: crazy-max/ghaction-import-gpg@72b6676b71ab476b77e676928516f6982eef7a41

.github/workflows/build.yml

@@ -56,7 +56,6 @@ jobs:
       - name: "Validate Flow PHAR"
         run: |
           ./build/flow.phar --version
-          ./build/flow.phar run examples/topics/phar/data_frame/code.php
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3

UPGRADE.md

@@ -170,8 +170,6 @@ We reworked most of the internal transformers to new scalar functions and entry
 
 All available functions can be found in [`ETL\Row\Function` folder](src/core/etl/src/Flow/ETL/Function) or in [`ETL\DSL\functions` file](src/core/etl/src/Flow/ETL/DSL/functions.php), and entry scalar functions are defined in `EntryScalarFunction`.
 
-To see what transformers are available see [`ETL\DSL\Transform` class](src/core/etl/src/Flow/ETL/DSL/Transform.php).
-
 Before:
 ```php
 <?php