tests: remove remnants of buffer-count test

The buffer-count test was added in
40c0c3f91e and removed in
4938f93f57, but the removal left around
the dependency to EGL headers in weston-test.c.

Removal of those unneeded includes allows us to drop the EGL dependency
completely from weston-test.c build.

For the Meson build this means that there are no dependency('egl')
directives anymore without the user friendly error message.

Signed-off-by: Pekka Paalanen <pq@iki.fi>

tests/meson.build

@@ -45,10 +45,7 @@ exe_plugin_test = shared_library(
 	weston_test_server_protocol_h,
 	weston_test_protocol_c,
 	include_directories: include_directories('..', '../shared'),
-	dependencies: [
-		dep_libweston,
-		dependency('egl'),
-	],
+	dependencies: [ dep_libweston ],
 	name_prefix: '',
 	install: false,
 )

tests/weston-test.c

@@ -36,12 +36,6 @@
 #include "compositor/weston.h"
 #include "weston-test-server-protocol.h"
 
-#ifdef ENABLE_EGL
-#include <EGL/egl.h>
-#include <EGL/eglext.h>
-#include "weston-egl-ext.h"
-#endif /* ENABLE_EGL */
-
 #include "shared/helpers.h"
 #include "shared/timespec-util.h"