Java: remove experimental files

Author: Jami Cogswell

java/ql/lib/ext/experimental/io.undertow.server.handlers.resource.model.yml

@@ -4,4 +4,3 @@ extensions:
       extensible: experimentalSinkModel
     data:
       - ["java.util.concurrent", "TimeUnit", True, "sleep", "", "", "Argument[0]", "thread-pause", "manual", "thread-resource-abuse"]
-      - ["java.util.concurrent", "TimeUnit", True, "sleep", "", "", "Argument[0]", "thread-pause", "manual", "unsafe-url-forward"]

java/ql/lib/ext/experimental/jakarta.servlet.http.model.yml

@@ -1,9 +1,4 @@
 extensions:
-  - addsTo:
-      pack: codeql/java-all
-      extensible: experimentalSourceModel
-    data:
-      - ["javax.servlet.http", "HttpServletRequest", True, "getServletPath", "", "", "ReturnValue", "remote", "manual", "unsafe-url-forward"]
   - addsTo:
       pack: codeql/java-all
       extensible: experimentalSourceModel
@@ -13,4 +8,3 @@ extensions:
       - ["javax.servlet.http", "HttpServletRequest", False, "getRequestURI", "()", "", "ReturnValue", "uri-path", "manual", "permissive-dot-regex-query"]
       - ["javax.servlet.http", "HttpServletRequest", False, "getRequestURL", "()", "", "ReturnValue", "uri-path", "manual", "permissive-dot-regex-query"]
       - ["javax.servlet.http", "HttpServletRequest", False, "getServletPath", "()", "", "ReturnValue", "uri-path", "manual", "permissive-dot-regex-query"]
-