Python: Remove deprecated BGL API

The API was in a deprecation state for many years now.
This API was not compatible with Metal nor Vulkan.

This also remove `Image.bindcode`.

Pull Request: https://projects.blender.org/blender/blender/pulls/140370

scripts/modules/gpu_extras/presets.py

@@ -89,14 +89,6 @@ def draw_texture_2d(texture, position, width, height):
         gpu.matrix.scale((width, height))
 
         shader = gpu.shader.from_builtin('IMAGE')
-
-        if isinstance(texture, int):
-            # Call the legacy bgl to not break the existing API
-            import bgl
-            bgl.glActiveTexture(bgl.GL_TEXTURE0)
-            bgl.glBindTexture(bgl.GL_TEXTURE_2D, texture)
-            shader.uniform_int("image", 0)
-        else:
-            shader.uniform_sampler("image", texture)
+        shader.uniform_sampler("image", texture)
 
         batch.draw(shader)