wip(render3d): plan 22.14 - the OpenGL backend removed (suite 306/306, not yet handed over)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

packages/ludic.render3d/env.ludic

@@ -150,10 +150,8 @@ export state Render3dState {
   gpu_fb: words = null
   gpu_fb_cap: int = 0
   gpu_fb_cur: int = 0
-  gpu_glcheck: int = -1
   gpu_rb_samples: int = 0
   gpu_drawbufs: words = null
-  gpu_glcheck_seen: []string = null
   gpu_variants: []GpuVariant = null
   gvk_ready: bool = false
   gvk_inst: pointer = null
@@ -554,9 +552,6 @@ export state Render3dState {
   r3d_root:   string = "packages/ludic.render3d"   # where shaders/ lives
   r3d_assets: string = "assets/polyhaven"          # where the CC0 assets live
   r3d_root_found: bool = false
-  r3d_noise_src:    string = null
-  r3d_lighting_src: string = null
-  r3d_wind_src: string = null
   r3d_prog_log: int = -1
   q_scratch: floats = null
   q_sy: floats = null                     # views of q_scratch's second, third and fourth