panvk/jm: Drop the loads_blend_const hack for uniform_count

We already mark all fragment shaders as always using blend constants so
this is handled by the existing code and our setting of push.count.
Also, this hack is wrong as it pushes way too much and might overflow
memory.  Also, it will overflow the HW limit of 64 as soon as we
increase the size of panvk_graphics_sysvals.

Reviewed-by: Lars-Ivar Hesselberg Simonsen <lars-ivar.simonsen@arm.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/39274>

src/panfrost/vulkan/jm/panvk_vX_cmd_draw.c

@@ -289,15 +289,6 @@ panvk_draw_prepare_fs_rsd(struct panvk_cmd_buffer *cmdbuf,
       if (fs) {
          pan_shader_prepare_rsd(fs_info, fs_code, &cfg);
 
-         if (binfo->shader_loads_blend_const) {
-            /* Preload the blend constant if the blend shader depends on it. */
-            cfg.preload.uniform_count =
-               MAX2(cfg.preload.uniform_count,
-                    DIV_ROUND_UP(SYSVALS_PUSH_CONST_BASE +
-                                    sizeof(struct panvk_graphics_sysvals),
-                                 8));
-         }
-
          uint8_t rt_mask = cmdbuf->state.gfx.render.bound_attachments &
                            MESA_VK_RP_ATTACHMENT_ANY_COLOR_BITS;
          uint8_t rt_written = color_attachment_written_mask(