GPUShader: Remove some of the unused shaders

keeping GPU_SHADER_SMOKE until other occurences are removed.

source/blender/gpu/intern/gpu_codegen.c

@@ -63,8 +63,6 @@
 #include <stdarg.h>
 
 extern char datatoc_gpu_shader_material_glsl[];
-extern char datatoc_gpu_shader_vertex_glsl[];
-extern char datatoc_gpu_shader_vertex_world_glsl[];
 extern char datatoc_gpu_shader_geometry_glsl[];
 
 static char *glsl_material_library = NULL;