*: remove "acbuild"

Signed-off-by: Gyuho Lee <leegyuho@amazon.com>

Documentation/dev-internal/release.md

@@ -63,7 +63,6 @@ All releases version numbers follow the format of [semantic versioning 2.0.0](ht
 
 ## Build release binaries and images
 
-- Ensure `acbuild` is available.
 - Ensure `docker` is available.
 
 Run release script in root directory:

Documentation/v2/dev/release.md

@@ -53,7 +53,6 @@ All releases version numbers follow the format of [semantic versioning 2.0.0](ht
 
 ## Build Release Binaries and Images
 
-- Ensure `acbuild` is available.
 - Ensure `docker` is available.
 
 Run release script in root directory:

scripts/build-release.sh

@@ -11,11 +11,6 @@ if [ -z "${VERSION}" ]; then
 	exit 255
 fi
 
-if ! command -v acbuild >/dev/null; then
-    echo "cannot find acbuild"
-    exit 1
-fi
-
 if ! command -v docker >/dev/null; then
     echo "cannot find docker"
     exit 1