Drop extra check for GTest

We require GLib >= 2.24 anyway now.

configure.ac

@@ -28,9 +28,6 @@ LT_PREREQ([2.2])
 LT_INIT
 
 
-PKG_CHECK_MODULES(GTest, glib-2.0 >= 2.16, [gtest=yes], [gtest=no])
-AM_CONDITIONAL(HAVE_GTEST, [test x$gtest = xyes])
-
 AC_MSG_CHECKING([operating system])
 os_win32=no
 case "$target_os" in

tests/gtest/Makefile.am

-if HAVE_GTEST
 TESTS_ENVIRONMENT = G_SLICE=debug-blocks \
 		    LD_LIBRARY_PATH=$(top_builddir)/libgupnp/.libs:$(LD_LIBRARY_PATH)
 
@@ -8,7 +7,6 @@ check_PROGRAMS = test-context test-bugs
 
 test_context_SOURCES = test-context.c
 test_bugs_SOURCES = test-bugs.c
-endif
 
 LDADD = \
 	$(top_builddir)/libgupnp/libgupnp-1.0.la \