test(flagd): remove dependency and switch to other envvar utils

Signed-off-by: Simon Schrottner <[email protected]>

Author: aepfli

pom.xml

@@ -186,20 +186,6 @@
             <scope>test</scope>
         </dependency>
 
-        <dependency>
-            <groupId>uk.org.webcompere</groupId>
-            <artifactId>system-stubs-core</artifactId>
-            <version>2.0.3</version>
-            <scope>test</scope>
-        </dependency>
-
-        <dependency>
-            <groupId>uk.org.webcompere</groupId>
-            <artifactId>system-stubs-jupiter</artifactId>
-            <version>2.1.7</version>
-            <scope>test</scope>
-        </dependency>
-
         <dependency>
             <groupId>io.cucumber</groupId>
             <artifactId>cucumber-java</artifactId>