Meta: Remove .gitignore from Base/

Base/.gitignore leaks into serenity's file-system. It can be safely
removed by adding equivalent un-ignore pattern in top-level .gitignore.

Author: ronak69

.gitignore

@@ -36,3 +36,6 @@ Userland/Libraries/LibWasm/Tests/Spec
 Tests/LibWeb/WPT/wpt
 Tests/LibWeb/WPT/metadata
 Tests/LibWeb/WPT/MANIFEST.json
+
+# Ensure that all files in /Base can be tracked, even if they match one of the above rules
+!/Base/**