[gimp] app: remove the gimp-2-6 session compatibility test

[Michael Natterer <mitch src gnome org>]

commit 45914520078ab4f0ed2caffb0f109ec5f76becda
Author: Michael Natterer <mitch gimp org>
Date:   Sun May 20 20:00:54 2018 +0200

    app: remove the gimp-2-6 session compatibility test
    
    It was unreliable and a huge pain, and 2.6 is really old shit.

 app/tests/.gitignore                       |    1 -
 app/tests/Makefile.am                      |    1 -
 app/tests/gimpdir/Makefile.am              |    3 -
 app/tests/gimpdir/dockrc-2-6               |   42 ----------
 app/tests/gimpdir/sessionrc-2-6            |   91 ---------------------
 app/tests/gimpdir/sessionrc-expected-2-6   |  117 ----------------------------
 app/tests/test-session-2-6-compatibility.c |   69 ----------------
 7 files changed, 0 insertions(+), 324 deletions(-)
---
diff --git a/app/tests/.gitignore b/app/tests/.gitignore
index 22c5bc6..ba0e1c5 100644
--- a/app/tests/.gitignore
+++ b/app/tests/.gitignore
@@ -9,7 +9,6 @@ test-gimpidtable*
 test-gimptilebackendtilemanager*
 test-layer-grouping*
 test-save-and-export*
-test-session-2-6-compatibility*
 test-session-2-8-compatibility-multi-window*
 test-session-2-8-compatibility-single-window*
 test-single-window-mode*
diff --git a/app/tests/Makefile.am b/app/tests/Makefile.am
index 547a3fa..be40e1d 100644
--- a/app/tests/Makefile.am
+++ b/app/tests/Makefile.am
@@ -22,7 +22,6 @@ TESTS = \
        test-core                                       \
        test-gimpidtable                                \
        test-save-and-export                            \
-       test-session-2-6-compatibility                  \
        test-session-2-8-compatibility-multi-window     \
        test-session-2-8-compatibility-single-window    \
        test-single-window-mode                         \
diff --git a/app/tests/gimpdir/Makefile.am b/app/tests/gimpdir/Makefile.am
index f503252..5a86a73 100644
--- a/app/tests/gimpdir/Makefile.am
+++ b/app/tests/gimpdir/Makefile.am
@@ -5,14 +5,11 @@ SUBDIRS = \
 
 EXTRA_DIST = \
        dockrc                                  \
-       dockrc-2-6                              \
        dockrc-2-8                              \
        dockrc-expected                         \
        sessionrc                               \
-       sessionrc-2-6                           \
        sessionrc-2-8-multi-window              \
        sessionrc-2-8-single-window             \
-       sessionrc-expected-2-6                  \
        sessionrc-expected-multi-window         \
        sessionrc-expected-single-window        \
        tags.xml