Revert "Add additional example."

This reverts commit 947b094.

Author: Max Schaefer

java/ql/src/Security/CWE/CWE-022/TaintedPath.qhelp

@@ -46,11 +46,6 @@ not contain ".." and starts with the public folder.</p>
 
 <sample src="TaintedPathGood.java" />
 
-<p>Alternatively, if you only want to allow simple filenames without a path component, you can remove all path
-separators ("/" or "\") and all ".." sequences from the input before using it to construct a file path.</p>
-
-<sample src="TaintedPathGood2.java" />
-
 </example>
 <references>
 

java/ql/src/Security/CWE/CWE-022/TaintedPathGood2.java

@@ -32,17 +32,4 @@ public void sendUserFileGood(Socket sock, String user) throws IOException {
             }
         }
     }
-
-    public void sendUserFileGood2(Socket sock, String user) throws IOException {
-        BufferedReader filenameReader = new BufferedReader(new InputStreamReader(sock.getInputStream(), "UTF-8"));
-        String filename = filenameReader.readLine();
-        // GOOD: remove all ".." sequences and path separators from the filename
-        filename = filename.replaceAll("\\.\\.|[/\\\\]", "");
-        BufferedReader fileReader = new BufferedReader(new FileReader(filename));
-        String fileLine = fileReader.readLine();
-        while(fileLine != null) {
-            sock.getOutputStream().write(fileLine.getBytes());
-            fileLine = fileReader.readLine();
-        }
-    }
 }