GetDiff: Remove weblinksOnly option

This option was only used by the GWT UI and is no longer needed.

Change-Id: I38516155ab771a2623a8dd39b256b1483d470c34
Signed-off-by: Edwin Kempin <ekempin@google.com>

Documentation/rest-api-changes.txt

@@ -5178,9 +5178,6 @@ parent commit number against which the diff should be generated.  This is useful
 for supporting review of merge commits.  The value is the 1-based index of the
 parent's position in the commit object.
 
-[[weblinks-only]]
-If the `weblinks-only` parameter is specified, only the diff web links are returned.
-
 .Request
 ----
   GET /changes/myProject~master~I8473b95934b5732ac55d26311a706c9c2bde9940/revisions/b6b9c10649b9041884046119ab794374470a1b45/files/gerrit-server%2Fsrc%2Fmain%2Fjava%2Fcom%2Fgoogle%2Fgerrit%2Fserver%2Fproject%2FRefControl.java/diff?base=2 HTTP/1.0

java/com/google/gerrit/server/restapi/change/GetDiff.java

@@ -108,9 +108,6 @@ public class GetDiff implements RestReadView<FileResource> {
   @Option(name = "--intraline")
   boolean intraline;
 
-  @Option(name = "--weblinks-only")
-  boolean webLinksOnly;
-
   @Inject
   GetDiff(
       ProjectCache projectCache,
@@ -213,7 +210,6 @@ public class GetDiff implements RestReadView<FileResource> {
               ps.getNewName());
       result.webLinks = links.isEmpty() ? null : links;
 
-      if (!webLinksOnly) {
       if (ps.isBinary()) {
         result.binary = true;
       }
@@ -258,7 +254,6 @@ public class GetDiff implements RestReadView<FileResource> {
         result.diffHeader = ps.getPatchHeader();
       }
       result.content = content.lines;
-      }
 
       Response<DiffInfo> r = Response.ok(result);
       if (resource.isCacheable()) {