usb: MSVC: pragma warning: make more specific, remove obsolete

Change-Id: I17030fc129de3e79965a1abe140fa0c28b949035
Reviewed-on: https://gerrit.libreoffice.org/49053Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>

ucb/source/ucp/ftp/curl.hxx

@@ -20,16 +20,8 @@
 #ifndef INCLUDED_UCB_SOURCE_UCP_FTP_CURL_HXX
 #define INCLUDED_UCB_SOURCE_UCP_FTP_CURL_HXX
 
-#if defined _MSC_VER
-#pragma warning(push, 1)
-#endif
-
 #include <curl/curl.h>
 
-#if defined _MSC_VER
-#pragma warning(pop)
-#endif
-
 #endif
 
 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */