[gtk+] css parser tests: Drop tests for -gtk-gradient

[Matthias Clasen <matthiasc src gnome org>]

commit 7d7b45cac050395a4cf7aaada0186a36db81ab12
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Mar 31 12:36:33 2017 -0400

    css parser tests: Drop tests for -gtk-gradient
    
    No longer needed.

 testsuite/css/parser/Makefile.am                   |    6 ------
 testsuite/css/parser/declarations-valid-19.css     |    3 ---
 testsuite/css/parser/declarations-valid-19.ref.css |    3 ---
 testsuite/css/parser/declarations-valid-20.css     |    5 -----
 testsuite/css/parser/declarations-valid-20.ref.css |    3 ---
 testsuite/css/parser/declarations-valid-21.css     |    6 ------
 testsuite/css/parser/declarations-valid-21.ref.css |    3 ---
 7 files changed, 0 insertions(+), 29 deletions(-)
---
diff --git a/testsuite/css/parser/Makefile.am b/testsuite/css/parser/Makefile.am
index 2cc8172..e691bd2 100644
--- a/testsuite/css/parser/Makefile.am
+++ b/testsuite/css/parser/Makefile.am
@@ -319,12 +319,6 @@ test_data = \
        declarations-valid-17.ref.css \
        declarations-valid-18.css \
        declarations-valid-18.ref.css \
-       declarations-valid-19.css \
-       declarations-valid-19.ref.css \
-       declarations-valid-20.css \
-       declarations-valid-20.ref.css \
-       declarations-valid-21.css \
-       declarations-valid-21.ref.css \
        declarations-valid-22.css \
        declarations-valid-22.ref.css \
        declarations-valid-23.css \