Add SlevomatCodingStandard.Variables.UnusedVariable

.phpcs.xml

@@ -14,4 +14,9 @@
             <property name="searchAnnotations" value="true"/>
         </properties>
     </rule>
+    <rule ref="SlevomatCodingStandard.Variables.UnusedVariable">
+        <properties>
+            <property name="ignoreUnusedValuesWhenOnlyKeysAreUsedInForeach" value="true" />
+        </properties>
+    </rule>
 </ruleset>

src/Helpers/BarChart.php

@@ -38,7 +38,6 @@ class BarChart
         }
 
         $roundedMax = (int) ceil($max / 5) * 5;
-        $step = $roundedMax / 5;
 
         return view('components/barchart', [
             'groups' => self::calculateChartGroups(

tests/Unit/Middleware/RouteDispatcherTest.php

@@ -9,7 +9,6 @@ use PHPUnit\Framework\MockObject\MockObject;
 use PHPUnit\Framework\TestCase;
 use Psr\Http\Message\ResponseInterface;
 use Psr\Http\Message\ServerRequestInterface;
-use Psr\Http\Message\UriInterface;
 use Psr\Http\Server\MiddlewareInterface;
 use Psr\Http\Server\RequestHandlerInterface;
 
@@ -132,8 +131,6 @@ class RouteDispatcherTest extends TestCase
         $request = $this->createMock(Request::class);
         /** @var RequestHandlerInterface|MockObject $handler */
         $handler = $this->getMockForAbstractClass(RequestHandlerInterface::class);
-        /** @var UriInterface|MockObject $uriInterface */
-        $uriInterface = $this->getMockForAbstractClass(UriInterface::class);
 
         $request->expects($this->atLeastOnce())
             ->method('getMethod')