Disable blur-performance build

This is an old test that isn't very relevant anymore, and it has
some linking problems because it includes private headers that
have inlined functions.

tests/blur-performance.c

@@ -1,61 +0,0 @@
-/* -*- mode: C; c-basic-offset: 2; indent-tabs-mode: nil; -*- */
-
-#include <gsk/gskcairoblurprivate.h>
-
-/* This is a hack to work around the fact that this code includes
- * private headers that inline access to non-exported variables.
- */
-GdkColorState *gdk_default_color_states;
-
-static void
-init_surface (cairo_t *cr)
-{
-  int w = cairo_image_surface_get_width (cairo_get_target (cr));
-  int h = cairo_image_surface_get_height (cairo_get_target (cr));
-
-  cairo_set_source_rgb (cr, 0, 0, 0);
-  cairo_fill (cr);
-
-  cairo_set_source_rgb (cr, 1, 1, 1);
-  cairo_arc (cr, w/2, h/2, w/2, 0, 2*G_PI);
-  cairo_fill (cr);
-}
-
-int
-main (int argc, char **argv)
-{
-  cairo_surface_t *surface;
-  cairo_t *cr;
-  GTimer *timer;
-  double msec;
-  int i, j;
-  int size;
-
-  gdk_default_color_states = gdk_color_state_get_srgb ();
-
-  timer = g_timer_new ();
-
-  size = 2000;
-
-  surface = cairo_image_surface_create (CAIRO_FORMAT_A8, size, size);
-
-  cr = cairo_create (surface);
-
-  /* We do everything three times, first two as warmup */
-  for (j = 0; j < 2; j++)
-    {
-      for (i = 1; i < 16; i++)
-	{
-	  init_surface (cr);
-	  g_timer_start (timer);
-	  gsk_cairo_blur_surface (surface, i, GSK_BLUR_X | GSK_BLUR_Y);
-	  msec = g_timer_elapsed (timer, NULL) * 1000;
-	  if (j == 1)
-	    g_print ("Radius %2d: %.2f msec, %.2f kpixels/msec:\n", i, msec, size*size/(msec*1000));
-	}
-    }
-
-  g_timer_destroy (timer);
-
-  return 0;
-}

tests/meson.build

@@ -17,7 +17,6 @@ gtk_tests = [
   ['animated-revealing', ['frame-stats.c', 'variable.c']],
   ['motion-compression'],
   ['scrolling-performance', ['frame-stats.c', 'variable.c']],
-  ['blur-performance', ['../gsk/gskcairoblur.c']],
   ['simple'],
   ['video-timer', ['variable.c']],
   ['testaccel'],