message: Remove context check for get_instance_proc_address
  Looks like this was missed from Attempting to set the context
  with vulkan results in a GLFW error (because the context client is
  set to GLFW_NO_API).
diff: @@ -1789,12 +1789,6 @@ impl Window {
  /// Wrapper for `glfwGetInstanceProcAddress`
  #[cfg(feature = "vulkan")]
  pub fn get_instance_proc_address(&mut self, instance: VkInstance, procname: &str) -> VkProc {
  - //TODO: Determine if setting this context as current is required? It doesn't seem to be required for vkCreateInstance,
  - //TODO: but it might be needed for other pointers.
  - if self.ptr != unsafe { ffi::glfwGetCurrentContext() } {
  - self.make_current();
  - }
  -
  self.glfw.get_instance_proc_address_raw(instance, procname)
  }
  