Remove Linux package service configs and pre/post install scripts (#11831)

Packer does not require the installation of a Packer user or a service for Packer.
This change removes the preinst and postrm user scripts, and the config_dir directive for Packer rpm installations.

Closes #11828

.github/workflows/build.yml

@@ -1,6 +1,6 @@
 #
-# This GitHub action builds Packer binaries, linux packages, 
-# and Docker images from source, and uploads them to GitHub artifacts. 
+# This GitHub action builds Packer binaries, linux packages,
+# and Docker images from source, and uploads them to GitHub artifacts.
 # Note that artifacts available via GitHub Artifacts are not codesigned or notarized.
 #
 
@@ -40,7 +40,7 @@ jobs:
           echo "::set-output name=product-version::$(make version)"
 
   generate-metadata-file:
-    needs: 
+    needs:
       - get-product-version
     runs-on: ubuntu-latest
     outputs:
@@ -75,7 +75,7 @@ jobs:
           echo "::set-output name=ldflags::"-s -w -X \'$project/version.GitCommit=$sha\'""
 
   build-other:
-    needs: 
+    needs:
       - get-product-version
       - get-go-version
       - set-ld-flags
@@ -121,7 +121,7 @@ jobs:
           path: out/${{ env.REPO_NAME }}_${{ needs.get-product-version.outputs.product-version }}_${{ matrix.goos }}_${{ matrix.goarch }}.zip
 
   build-linux:
-    needs: 
+    needs:
       - get-product-version
       - get-go-version
       - set-ld-flags
@@ -174,9 +174,6 @@ jobs:
           binary: "dist/${{ env.REPO_NAME }}"
           deb_depends: "openssl"
           rpm_depends: "openssl"
-          config_dir: ".release/linux/package/"
-          preinstall: ".release/linux/preinst"
-          postremove: ".release/linux/postrm"
       - name: Add Linux Package names to env
         run: |
           echo "RPM_PACKAGE=$(basename out/*.rpm)" >> $GITHUB_ENV
@@ -191,7 +188,7 @@ jobs:
           path: out/${{ env.DEB_PACKAGE }}
 
   build-darwin:
-    needs: 
+    needs:
       - get-product-version
       - get-go-version
       - set-ld-flags

.release/linux/package/usr/lib/systemd/system/packer.service

@@ -1,23 +0,0 @@
-[Unit]
-Description="HashiCorp Packer - A tool for creating identical machine images for multiple platforms from a single source configuration"
-Documentation=https://www.packer.io/docs
-StartLimitIntervalSec=60
-StartLimitBurst=3
-
-[Service]
-EnvironmentFile=-/etc/packer.d/packer.env
-User=packer
-Group=packer
-ProtectSystem=full
-ProtectHome=read-only
-ExecStart=/usr/bin/packer server -config=/etc/packer.d
-ExecReload=/bin/kill --signal HUP $MAINPID
-KillMode=process
-KillSignal=SIGINT
-Restart=on-failure
-RestartSec=5
-TimeoutStopSec=30
-LimitMEMLOCK=infinity
-
-[Install]
-WantedBy=multi-user.target

.release/linux/postrm

@@ -1,8 +0,0 @@
-#!/bin/bash
-
-if [ "$1" = "purge" ]
-then
-  userdel packer
-fi
-
-exit 0

.release/linux/preinst

@@ -1,13 +0,0 @@
-#!/bin/bash
-
-set -eu
-
-USER="packer"
-
-if ! id -u $USER > /dev/null 2>&1; then
-	useradd \
-		--system \
-		--user-group \
-		--shell /bin/false \
-		$USER
-fi