[gin:templates] Remove .gin.zip download

1. Remove description for .gin.zip download but keep warning for pointer
   files.
2. Remove link for .gin.zip

templates/repo/home.tmpl

@@ -92,13 +92,10 @@
 									<p>Download the small files and the file structure as an archive (.zip or .tar.gz). Annexed files (by default, files larger than 10 MB) will be
 									included as pointer files (stubs) but the data will not be included. To get the content of the big files you need to download them individually
 									from this web page.</p>
-									<p>Download the small files as a GIN archive (.gin.zip). This includes all the git information,
-									including the history of the repository and the possibility to download the content of large files using git annex or the GIN client.</p>
 								</div>
 								<div class="actions">
 									<a class="ui positive button" href="{{$.RepoLink}}/archive/{{EscapePound $.BranchName}}.zip"><i class="octicon octicon-file-zip"></i> Download zip</a>
 									<a class="ui positive button" href="{{$.RepoLink}}/archive/{{EscapePound $.BranchName}}.tar.gz"><i class="octicon octicon-file-zip"></i> Download tar.gz</a>
-									<a class="ui positive button" href="{{$.RepoLink}}/archive/{{EscapePound $.BranchName}}.gin.zip"><i class="octicon octicon-file-zip"></i> Download GIN archive</a>
 								</div>
 							</div>
 						</div>