docs: minor update for proxes upload

Author: fstagni

docs/source/UserGuide/Tutorials/ManagingUserCredentials/index.rst

@@ -86,13 +86,13 @@ Creating a user proxy
   The switches below will create a proxy of group "dirac_user" (if defined) and will securely upload such
   proxy to the DIRAC proxy store (ProxyManager), from where it could later be downloaded::
 
-        dirac-proxy-init --group dirac_user --upload
+        dirac-proxy-init --group dirac_user
 
 
   The additional "--debug" switch (alias of "-ddd") can be used for debugging purposes,
   and its output would end up being similar to the following::
 
-        $ dirac-proxy-init --group dirac_user --upload --debug
+        $ dirac-proxy-init --group dirac_user --debug
         Generating proxy...
         Enter Certificate password:
         Contacting CS...
@@ -130,9 +130,6 @@ Creating a user proxy
     VOMS extension corresponding to the DIRAC group if the gLite UI environment is available.
     This proxy is stored in the local "/tmp/" directory, as shown.
 
-  If the gLite UI environment is not available, the VOMS extensions will not be loaded into the proxy.
-  This is not a serious problem, still most of the operations will be possible.
-
 
 Getting the proxy information
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