debugextensions: drop the color from the test

We are about to remove the extension so we remove trace of it in this specific
test to prevent it to be confused.

tests/test-debugextensions.t

@@ -11,7 +11,6 b''
 
   $ cat >> $HGRCPATH <<EOF
   > [extensions]
-  > color=
   > histedit=
   > patchbomb=
   > rebase=
@@ -21,7 +20,6 b''
   > EOF
 
   $ hg debugextensions
-  color
   ext1 (untested!)
   ext2 (3.2.1!)
   histedit
@@ -30,9 +28,6 b''
   rebase
 
   $ hg debugextensions -v
-  color
-    location: */hgext/color.py* (glob)
-    bundled: yes
   ext1
     location: */extwithoutinfos.py* (glob)
     bundled: no
@@ -58,13 +53,6 b''
   [
    {
     "buglink": "",
-    "bundled": true,
-    "name": "color",
-    "source": "*/hgext/color.py*", (glob)
-    "testedwith": []
-   },
-   {
-    "buglink": "",
     "bundled": false,
     "name": "ext1",
     "source": "*/extwithoutinfos.py*", (glob)