vulkan: combine doc with README.md file

Bug: 134185757
Test: build
Change-Id: Ib0cba55e07df92183c4a0ab1851d5610c9de4ac9
diff --git a/vulkan/README.md b/vulkan/README.md
index 0f66097..185aa39 100644
--- a/vulkan/README.md
+++ b/vulkan/README.md
@@ -2,6 +2,10 @@
 
 This subdirectory contains Android's Vulkan loader, as well as some Vulkan-related tools useful to platform developers.
 
+## Documentation
+
+The former contents of doc/implementors_guide/ are now at https://source.android.com/devices/graphics/implement-vulkan.
+
 ## Coding Style
 
 We follow the [Chromium coding style](https://www.chromium.org/developers/coding-style) for naming and formatting, except with four-space indentation instead of two spaces. In general, any C++ features supported by the prebuilt platform toolchain are allowed.
@@ -12,6 +16,7 @@
 
 We generate several parts of the loader and tools driectly from the Vulkan Registry (external/vulkan-headers/registry/vk.xml). Code generation must be done manually because the generator is not part of the platform toolchain (yet?). Files named `foo_gen.*` are generated by the code generator.
 
- To run the generator:
-- Install Python3 (if not already installed)
-- `$ ./<path to>/frameworks/native/vulkan/scripts/code_generator.py`
+### Run The Code Generator
+
+Install Python3 (if not already installed) and execute below:
+`$ ./scripts/code_generator.py`
diff --git a/vulkan/doc/README b/vulkan/doc/README
deleted file mode 100644
index d1dc2e1..0000000
--- a/vulkan/doc/README
+++ /dev/null
@@ -1,2 +0,0 @@
-The former contents of implementors_guide/ are now at
-https://source.android.com/devices/graphics/implement-vulkan