fixup: removed unneeded import

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

Author: aepfli

src/main/java/dev/openfeature/sdk/HookData.java

@@ -1,6 +1,5 @@
 package dev.openfeature.sdk;
 
-import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;