ci/build-binaries: Don't enable cgo for Darwin

Previously, it was necessary to enable cgo
and use the system's DNS resolver on macOS.
In Go 1.20, the `net` package was rewritten
to not use cgo at all,
so CGO_ENABLED no longer has any effect there.

In fact, ever since 3898600,
this setting has been meaningless
because we've been building Darwin binaries
on Ubuntu machines (so cgo can't be enabled anyway).

This commit just deletes this now-unused block.

scripts/go-wrapper.sh

@@ -23,17 +23,6 @@ COVER_PACKAGES=( \
 # Join COVER_PACKAGES with commas.
 COVERPKG=$(IFS=,; echo "${COVER_PACKAGES[*]}")
 
-# If it's a production or local build - building for macOS on macOS - use CGO for DNS resolver functionality.
-#
-# See: https://github.com/golang/go/issues/12524
-if [ "$(go env GOOS)" = "darwin" ] && [ "$(uname)" = "Darwin" ]; then
-    # `go env GOOS` returns "darwin" when cross-compiling to macOS
-    # `uname` returns "Darwin" on macOS
-    export CGO_ENABLED=1
-else
-    export CGO_ENABLED=0
-fi
-
 case "$1" in
     build)
         MODE="$PULUMI_BUILD_MODE"