PDF: Remove radial gradient fallback

when one circle not inside the other. Pixman now follows the PDF
specification.

src/cairo-pdf-surface.c

@@ -5350,27 +5350,12 @@ _gradient_pattern_supported (const cairo_pattern_t *pattern)
 
 
     /* Radial gradients are currently only supported with EXTEND_NONE
-     * and EXTEND_PAD and when one circle is inside the other. */
+     * and EXTEND_PAD. */
     if (pattern->type == CAIRO_PATTERN_TYPE_RADIAL) {
-        double x1, y1, x2, y2, r1, r2, d;
-        cairo_radial_pattern_t *radial = (cairo_radial_pattern_t *) pattern;
-
 	if (extend == CAIRO_EXTEND_REPEAT ||
 	    extend == CAIRO_EXTEND_REFLECT) {
 	    return FALSE;
 	}
-
-	x1 = _cairo_fixed_to_double (radial->c1.x);
-        y1 = _cairo_fixed_to_double (radial->c1.y);
-        r1 = _cairo_fixed_to_double (radial->r1);
-        x2 = _cairo_fixed_to_double (radial->c2.x);
-        y2 = _cairo_fixed_to_double (radial->c2.y);
-        r2 = _cairo_fixed_to_double (radial->r2);
-
-        d = sqrt((x2 - x1)*(x2 - x1) + (y2 - y1)*(y2 - y1));
-        if (d > fabs(r2 - r1)) {
-            return FALSE;
-        }
     }
 
     return TRUE;