Remove a couple of TODOs from GL driver

* GL_MIN_MAP_BUFFER_ALIGNMENT is now satisfied (up to 64), and from reading
  the spec, yes the mip dimensions have to be defined as standard, you
  can't define just some crazy custom mip chain sizes as that's invalid.

renderdoc/driver/gl/gl_replay.cpp

@@ -431,7 +431,6 @@ void GLReplay::CacheTexture(ResourceId id)
 	if(levelQueryType == eGL_TEXTURE_CUBE_MAP)
 		levelQueryType = eGL_TEXTURE_CUBE_MAP_POSITIVE_X;
 
-	// TODO if I call this for levels 1, 2, .. etc. Can I get sizes that aren't mip dimensions?
 	GLint width = 1, height = 1, depth = 1, samples=1;
 	gl.glGetTextureLevelParameterivEXT(res.resource.name, levelQueryType, 0, eGL_TEXTURE_WIDTH, &width);
 	gl.glGetTextureLevelParameterivEXT(res.resource.name, levelQueryType, 0, eGL_TEXTURE_HEIGHT, &height);

renderdoc/driver/gl/wrappers/gl_buffer_funcs.cpp

@@ -1280,8 +1280,6 @@ void *WrappedOpenGL::glMapNamedBufferEXT(GLuint buffer, GLenum access)
 			return record->Map.ptr;
 		}
 
-		// TODO align return pointer to GL_MIN_MAP_BUFFER_ALIGNMENT (min 64)
-
 		if(access == eGL_READ_ONLY)
 		{
 			record->Map.status = GLResourceRecord::Mapped_Read_Real;