[LyX/master] Revert "Mover.h: let move be defined"

[Scott Kostyshak]

commit ee7d78d1dc25f7ae4fd876264bb5bd6bba004b81
Author: Scott Kostyshak <skost...@lyx.org>
Date:   Fri Apr 21 22:41:03 2017 -0400

    Revert "Mover.h: let move be defined"
    
    This reverts commit d4ea07705a88089519b80db3307a7d940fbae40d.
    
    d4ea0770 lead to a compile error with gcc 4.6. The error is likely
    due to that version's weak C++11 support.
    
    This commit reverts d4ea0770 in order to preserve compilation with
    gcc 4.6 for alpha1.
---
 src/Mover.h |   12 ++++--------
 1 files changed, 4 insertions(+), 8 deletions(-)

diff --git a/src/Mover.h b/src/Mover.h
index e432a3d..4d1c1c7 100644
--- a/src/Mover.h
+++ b/src/Mover.h
@@ -27,13 +27,7 @@ namespace support { class FileName; }
 class Mover
 {
 public:
-       virtual ~Mover() = default;
-       Mover(Mover &&) = default;
-       Mover & operator=(Mover &&) = default;
-       Mover(Mover const &) = default;
-       Mover & operator=(Mover const &) = default;
-
-       Mover() = default;
+       virtual ~Mover() {}
 
        /** Copy file @c from to @c to.
         *  This version should be used to copy files from the original
@@ -115,7 +109,9 @@ protected:
 class SpecialisedMover : public Mover
 {
 public:
-       SpecialisedMover() = default;
+       SpecialisedMover() {}
+
+       virtual ~SpecialisedMover() {}
 
        /** @c command should be of the form
         *  <code>