[gnome-shell] build: Drop obsolete pkg-config check

[Florian Müllner <fmuellner src gnome org>]

commit 4bada0691753d3af25c61ffe5133112b45372bb0
Author: Florian Müllner <fmuellner gnome org>
Date:   Sun May 28 17:51:18 2017 +0200

    build: Drop obsolete pkg-config check
    
    The check belongs to the test-recorder executable that was dropped
    in commit d52c95a15f5e.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=783206

 configure.ac |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index d266c1c..969b647 100644
--- a/configure.ac
+++ b/configure.ac
@@ -61,7 +61,6 @@ if $PKG_CONFIG --exists gstreamer-1.0 '>=' $GSTREAMER_MIN_VERSION ; then
    AC_MSG_RESULT(yes)
    build_recorder=true
    recorder_modules="gstreamer-1.0 gstreamer-base-1.0 x11 gtk+-3.0"
-   PKG_CHECK_MODULES(TEST_SHELL_RECORDER, $recorder_modules $LIBMUTTER_CLUTTER)
 else
    AC_MSG_RESULT(no)
 fi