Remove tensorflow submodule in favor of bazel fetch. (#8085)

* Remove tensorflow submodule in favor of bazel fetch.

Now that integrations/tensorflow is isolated from the rest of IREE, we can just have bazel fetch tensorflow and leave git out of it. Will see how the ergonomics of this is.

.gitmodules

diff --git a/.gitmodules b/.gitmodules
index a40d532..7b053e2 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,9 +4,6 @@
 [submodule "third_party/llvm-project"]
 	path = third_party/llvm-project
 	url = https://github.com/llvm/llvm-project.git
-[submodule "third_party/tensorflow"]
-	path = third_party/tensorflow
-	url = https://github.com/tensorflow/tensorflow.git
 [submodule "third_party/vulkan_headers"]
 	path = third_party/vulkan_headers
 	url = https://github.com/KhronosGroup/Vulkan-Headers.git

SUBMODULE_VERSIONS.txt

diff --git a/SUBMODULE_VERSIONS.txt b/SUBMODULE_VERSIONS.txt
index bdaec94..e437363 100644
--- a/SUBMODULE_VERSIONS.txt
+++ b/SUBMODULE_VERSIONS.txt
@@ -11,7 +11,6 @@
 e9cc6403341baf0edd430a4027b074d0a06b782f third_party/spirv_cross
 d53b49635b7484e86959608a65a64d8121e6a385 third_party/spirv_headers
 af1a5bc352164740c1cc1354942b1c6b72eacb8a third_party/stblib
-baa6d31a0af6adb7058e229001931a1fdd6f81bb third_party/tensorflow
 058e89011fceca912d43638ebb6b85992147fcfe third_party/tracy
 9e62d027636cd7210f60d934f56107ed6e1579b8 third_party/vulkan_headers
 5c8b3ba955f0dbb30d18afc420f3a38adc779231 third_party/vulkan_memory_allocator

integrations/tensorflow/WORKSPACE

diff --git a/integrations/tensorflow/WORKSPACE b/integrations/tensorflow/WORKSPACE
index 54e64a2..9ab0803 100644
--- a/integrations/tensorflow/WORKSPACE
+++ b/integrations/tensorflow/WORKSPACE
@@ -5,9 +5,14 @@
 # SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 """Adds a local dependency on tensorflow."""
 
-local_repository(
+load("@bazel_tools//tools/build_defs/repo:git.bzl", "git_repository")
+
+TENSORFLOW_COMMIT = "baa6d31a0af6adb7058e229001931a1fdd6f81bb"
+
+git_repository(
     name = "org_tensorflow",
-    path = "../../third_party/tensorflow",
+    commit = TENSORFLOW_COMMIT,
+    remote = "https://github.com/tensorflow/tensorflow.git",
 )
 
 # Import all of the tensorflow dependencies.

third_party/tensorflow

diff --git a/third_party/tensorflow b/third_party/tensorflow
deleted file mode 160000
index baa6d31..0000000
--- a/third_party/tensorflow
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit baa6d31a0af6adb7058e229001931a1fdd6f81bb