Remove @pzread from CODEOWNERS (#17254)

Remove myself from the code owners as I won't be actively working on
IREE for a while.
diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
index 45ae89c..b54e270 100644
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -38,9 +38,8 @@
 /experimental/webgpu/ @benvanik @ScottTodd
 
 # Infra Top-Level Directories
-/build_tools/ @ScottTodd @pzread
-/build_tools/benchmarks/ @antiagainst @pzread
-/build_tools/python/ @pzread
+/build_tools/ @ScottTodd
+/build_tools/benchmarks/ @antiagainst
 /build_tools/python_deploy/ @stellaraccident
 /build_tools/scripts/ @ScottTodd
 /build_tools/third_party/ @ScottTodd @stellaraccident