Disable pre-commit on Windows

Pre-commit checks are slow on Windows, and Visual Studio can already
enforce the invocation of clang-format.

Bug: b/203200623
Change-Id: Ifaf169861ddf5973446b2c2c7626edf59a6cb2de

pre-commit

diff --git a/pre-commit b/pre-commit
index d694756..e3760ff 100755
--- a/pre-commit
+++ b/pre-commit
@@ -6,6 +6,11 @@
     'If this is unexpected, please file a go/git-bug' >&2
 fi
 
+# Do not perform pre-commit on Windows
+if [[ "$OSTYPE" == "win32" || "$OSTYPE" == "msys" ]]
+    exit 0
+fi
+
 # Make a temporary directory
 TMPDIR=$(mktemp -d -t gcp-$(date +%Y-%m-%d-%H-%M-%S)-XXXXXXXXXX)
 diffFile=$(mktemp gpc-XXXXXXXXX --tmpdir=$TMPDIR)