Revert "[net] deprecate TGridCollection"

This reverts commit 18c9e6e.

Author: silverweed

net/net/inc/LinkDef.h

@@ -36,13 +36,11 @@
 #pragma link C++ class TGridJob+;
 #pragma link C++ class TGridJobStatus+;
 #pragma link C++ class TGridJobStatusList+;
-#pragma link C++ class ROOT::Deprecated::TGridCollection+;
+#pragma link C++ class TGridCollection+;
 #pragma link C++ class TFileStager;
 #pragma link C++ class TApplicationRemote;
 #pragma link C++ class TApplicationServer;
 #pragma link C++ class TUDPSocket;
 #pragma link C++ class TParallelMergingFile+;
 
-#pragma read sourceClass="TGridCollection" version="[-1]" targetClass="ROOT::Deprecated::TGridCollection"
-
 #endif

net/net/inc/TGrid.h

@@ -37,12 +37,11 @@
 class TGridResult;
 class TGridJDL;
 class TGridJob;
+class TGridCollection;
 class TGridJobStatusList;
 
 namespace ROOT::Deprecated {
 
-class TGridCollection;
-
 class TGrid : public TObject {
 
 protected:

net/net/inc/TGridCollection.h

@@ -30,7 +30,6 @@ class TDSet;
 class TGridResult;
 class TFileCollection;
 
-namespace ROOT::Deprecated {
 
 class TGridCollection : public TObject {
 public:
@@ -116,9 +115,4 @@ class TGridCollection : public TObject {
    ClassDefOverride(TGridCollection,1)  // ABC managing collection of files on the Grid
 };
 
-} // namespace ROOT::Deprecated
-
-using TGridCollection R__DEPRECATED(6, 42, "TGridCollection is expected to be unused and thus deprecated") =
-   ROOT::Deprecated::TGridCollection;
-
 #endif