diff --git a/core/base/CMakeLists.txt b/core/base/CMakeLists.txt
index 33ad00aae5e05..b5f7ccc89a96c 100644
--- a/core/base/CMakeLists.txt
+++ b/core/base/CMakeLists.txt
@@ -198,12 +198,6 @@ set(BASE_SOURCES
   src/TVirtualX.cxx
 )
 
-if(root7)
-  set(BASE_HEADER_DIRS inc/ v7/inc/)
-  list(APPEND BASE_HEADERS
-      ROOT/RIndexIter.hxx)
-endif()
-
 # only here complete list of headers can be propogated to parent cmake file
 set_property(TARGET Core APPEND PROPERTY DICT_HEADERS ${BASE_HEADERS})
 
@@ -211,7 +205,6 @@ target_sources(Core PRIVATE ${BASE_SOURCES})
 
 target_include_directories(Core PUBLIC
   $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/inc>
-  $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/v7/inc>
 )
 
 if(PCRE2_FOUND)
diff --git a/core/base/v7/inc/ROOT/RIndexIter.hxx b/core/base/v7/inc/ROOT/RIndexIter.hxx
deleted file mode 100644
index bbc0ada93c369..0000000000000
--- a/core/base/v7/inc/ROOT/RIndexIter.hxx
+++ /dev/null
@@ -1,161 +0,0 @@
-/// \file ROOT/RIndexIter.hxx
-/// \ingroup Base ROOT7
-/// \author Axel Naumann <axel@cern.ch>
-/// \date 2016-01-19
-/// \warning This is part of the ROOT 7 prototype! It will change without notice. It might trigger earthquakes. Feedback
-/// is welcome!
-
-/*************************************************************************
- * Copyright (C) 1995-2016, Rene Brun and Fons Rademakers.               *
- * All rights reserved.                                                  *
- *                                                                       *
- * For the licensing terms see $ROOTSYS/LICENSE.                         *
- * For the list of contributors see $ROOTSYS/README/CREDITS.             *
- *************************************************************************/
-
-#ifndef ROOT7_RIndexIter
-#define ROOT7_RIndexIter
-
-#include <iterator>
-
-namespace ROOT {
-namespace Experimental {
-namespace Internal {
-
-/**
- \class RIndexIter
- Iterates over an index; the REFERENCE is defined by the REFERENCE template parameter.
-
- Derived classes are expected to implement `const REFERENCE& operator*()` and
- `const POINTER operator->()`.
- */
-
-template <class REFERENCE,
-          class POINTER = typename std::add_pointer<typename std::remove_reference<REFERENCE>::type>::type>
-class RIndexIter {
-   size_t fIndex;
-
-protected:
-   static constexpr size_t fgEndIndex = (size_t)-1;
-
-public:
-   using iterator_category = std::random_access_iterator_tag;
-   using value_type = typename std::remove_reference<REFERENCE>::type;
-   using difference_type = std::ptrdiff_t;
-   using pointer = POINTER;
-   using reference = REFERENCE;
-
-   RIndexIter(size_t idx): fIndex(idx) {}
-
-   /// Get the current index value.
-   size_t GetIndex() const noexcept { return fIndex; }
-
-   ///\{
-   ///\name Index modifiers
-   /// ++i
-   RIndexIter &operator++() noexcept
-   {
-      ++fIndex;
-      return *this;
-   }
-
-   /// --i
-   RIndexIter &operator--() noexcept
-   {
-      if (fIndex != fgEndIndex)
-         --fIndex;
-      return *this;
-   }
-
-   /// i++
-   RIndexIter operator++(int)noexcept
-   {
-      RIndexIter old(*this);
-      ++(*this);
-      return old;
-   }
-
-   // i--
-   RIndexIter operator--(int)noexcept
-   {
-      RIndexIter old(*this);
-      --(*this);
-      return old;
-   }
-
-   RIndexIter &operator+=(int d) noexcept
-   {
-      fIndex += d;
-      return *this;
-   }
-
-   RIndexIter &operator-=(int d) noexcept
-   {
-      if (d > fIndex) {
-         fIndex = fgEndIndex;
-      } else {
-         fIndex -= d;
-      }
-      return *this;
-   }
-
-   RIndexIter operator+(int d) noexcept
-   {
-      RIndexIter ret(*this);
-      ret += d;
-      return ret;
-   }
-
-   RIndexIter operator-(int d) noexcept
-   {
-      RIndexIter ret(*this);
-      ret -= d;
-      return ret;
-   }
-   ///\}
-};
-
-///\{
-///\name Relational operators.
-template <class REFERENCE, class POINTER>
-bool operator<(RIndexIter<REFERENCE, POINTER> lhs, RIndexIter<REFERENCE, POINTER> rhs) noexcept
-{
-   return lhs.GetIndex() < rhs.GetIndex();
-}
-
-template <class REFERENCE, class POINTER>
-bool operator>(RIndexIter<REFERENCE, POINTER> lhs, RIndexIter<REFERENCE, POINTER> rhs) noexcept
-{
-   return lhs.GetIndex() > rhs.GetIndex();
-}
-
-template <class REFERENCE, class POINTER>
-bool operator<=(RIndexIter<REFERENCE, POINTER> lhs, RIndexIter<REFERENCE, POINTER> rhs) noexcept
-{
-   return lhs.GetIndex() <= rhs.GetIndex();
-}
-
-template <class REFERENCE, class POINTER>
-inline bool operator>=(RIndexIter<REFERENCE, POINTER> lhs, RIndexIter<REFERENCE, POINTER> rhs) noexcept
-{
-   return lhs.GetIndex() >= rhs.GetIndex();
-}
-
-template <class REFERENCE, class POINTER>
-inline bool operator==(RIndexIter<REFERENCE, POINTER> lhs, RIndexIter<REFERENCE, POINTER> rhs) noexcept
-{
-   return lhs.GetIndex() == rhs.GetIndex();
-}
-
-template <class REFERENCE, class POINTER>
-inline bool operator!=(RIndexIter<REFERENCE, POINTER> lhs, RIndexIter<REFERENCE, POINTER> rhs) noexcept
-{
-   return lhs.GetIndex() != rhs.GetIndex();
-}
-///\}
-
-} // namespace Internal
-} // namespace Experimental
-} // namespace ROOT
-
-#endif // ROOT7_RIndexIter