Remove check-python-task and the related unused dependencies

Author: MatteoPologruto

Diff for: .flake8

@@ -235,22 +235,6 @@ tasks:
     cmds:
       - clang-format -i rpc/cc/arduino/cli/*/*/*.proto
 
-  # Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/check-python-task/Taskfile.yml
-  python:format:
-    desc: Format Python files
-    deps:
-      - task: poetry:install-deps
-    cmds:
-      - poetry run black .
-
-  # Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/check-python-task/Taskfile.yml
-  python:lint:
-    desc: Lint Python code
-    deps:
-      - task: poetry:install-deps
-    cmds:
-      - poetry run flake8 --show-source
-
   build:
     desc: Build the project
     deps:
@@ -288,7 +272,6 @@ tasks:
     cmds:
       - task: go:vet
       - task: go:lint
-      - task: python:lint
       - task: protoc:check
 
   check-legacy:

Diff for: .github/workflows/check-python-task.yml

@@ -187,23 +187,6 @@ To run very specific test functions:
 go test -v github.com/arduino/arduino-cli/internal/integrationtest/lib -run TestLibUpgradeCommand
 ```
 
-#### Linting and formatting
-
-When editing any Python file in the project remember to run linting checks with:
-
-```shell
-task python:lint
-```
-
-This will run `flake8` automatically and return any error in the code formatting, if not already installed it will also
-install integration tests dependencies.
-
-In case of linting errors you should be able to solve most of them by automatically formatting with:
-
-```shell
-task python:format
-```
-
 ### Dependency license metadata
 
 Metadata about the license types of all dependencies is cached in the repository. To update this cache, run the