Cleanup: remove redundant const qualifiers for POD types

MSVC used to warn about const mismatch for arguments passed by value.
Remove these as newer versions of MSVC no longer show this warning.

source/blender/gpu/opengl/gl_vertex_array.hh

@@ -39,13 +39,13 @@ namespace GLVertArray {
 void update_bindings(const GLuint vao,
                      const GPUBatch *batch,
                      const ShaderInterface *interface,
-                     const int base_instance);
+                     int base_instance);
 
 /**
  * Another version of update_bindings for Immediate mode.
  */
 void update_bindings(const GLuint vao,
-                     const uint v_first,
+                     uint v_first,
                      const GPUVertFormat *format,
                      const ShaderInterface *interface);