Remove dummy unit tests (#79)

* Update phpunit/phpunit requirement from ^9.0||^7.0 to ^9.0||^7.0||^10.0

Updates the requirements on [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) to permit the latest version.
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/10.2.3/ChangeLog-10.2.md)
- [Commits](https://github.com/sebastianbergmann/phpunit/commits/10.2.3)

---
updated-dependencies:
- dependency-name: phpunit/phpunit
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

* remove dummy unit tests

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Cristian Tăbăcitu <cristian.tabacitu@digitallyhappy.com>

README.md

@@ -114,12 +114,6 @@ For Installation type (B), change the namespace to `Backpack\MenuCRUD\app\Models
 
 Please see [CHANGELOG](CHANGELOG.md) for more information what has changed recently.
 
-## Testing
-
-``` bash
-composer test
-```
-
 ## Overwriting functionality
 
 If you've used installation type A and need to modify how this works in a project: 

composer.json

@@ -23,7 +23,6 @@
         "backpack/pagemanager": "^3.2"
     },
     "require-dev": {
-        "phpunit/phpunit" : "^9.0||^7.0",
         "scrutinizer/ocular": "~1.1",
         "squizlabs/php_codesniffer": "~2.3 || ~3.0"
     },
@@ -32,14 +31,6 @@
             "Backpack\\MenuCRUD\\": "src"
         }
     },
-    "autoload-dev": {
-        "psr-4": {
-            "Backpack\\MenuCRUD\\": "tests"
-        }
-    },
-    "scripts": {
-        "test": "vendor/bin/phpunit --testdox"
-    },
     "extra": {
         "branch-alias": {
             "dev-master": "1.0-dev"