patch 8.0.0653: the default highlight for QuickFixLine is not good

Problem:    The default highlight for QuickFixLine does not work for several
            color schemes. (Manas Thakur)
Solution:   Make the default use the old color. (closes #1780)
diff --git a/src/syntax.c b/src/syntax.c
index 6aec63d..45d9bda 100644
--- a/src/syntax.c
+++ b/src/syntax.c
@@ -6909,6 +6909,7 @@
 	"Cursor guibg=fg guifg=bg",
 	"lCursor guibg=fg guifg=bg", /* should be different, but what? */
 #endif
+	"default link QuickFixLine Search",
 	NULL
     };
 
@@ -6997,8 +6998,6 @@
 #ifdef FEAT_GUI
 	"Normal gui=NONE",
 #endif
-	CENT("QuickFixLine term=reverse ctermbg=Cyan",
-	     "QuickFixLine term=reverse ctermbg=Cyan guibg=Cyan"),
 	NULL
     };
 
@@ -7084,8 +7083,6 @@
 	CENT("Conceal ctermbg=DarkGrey ctermfg=LightGrey",
 	     "Conceal ctermbg=DarkGrey ctermfg=LightGrey guibg=DarkGrey guifg=LightGrey"),
 #endif
-	CENT("QuickFixLine term=reverse ctermbg=Cyan",
-	     "QuickFixLine term=reverse ctermbg=Cyan guibg=Cyan"),
 #ifdef FEAT_GUI
 	"Normal gui=NONE",
 #endif