Revert "Add the test for HTTPPROXY"

This reverts commit 576f0bfc.

The proxy information will be removed at next commit.

re #6707

Code/Mantid/Framework/Kernel/test/FacilitiesTest.h

@@ -76,7 +76,6 @@ public:
     TS_ASSERT_EQUALS( fac->extensions()[0],".xyz" );
     TS_ASSERT_EQUALS( fac->preferredExtension(), ".xyz" );
     TS_ASSERT( fac->getSoapEndPoint().empty() );
-    TS_ASSERT( fac->getHTTPProxy().empty() );
     TS_ASSERT( fac->catalogName().empty() );
     TS_ASSERT( fac->archiveSearch().empty() );
     TS_ASSERT( fac->liveListener().empty() );