Update release workflow

Author: trask

.github/workflows/release.yml

@@ -134,23 +134,6 @@ jobs:
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
-          sdk_version=$(grep -Po "val otelSdkVersion = \"\K[0-9]+.[0-9]+.[0-9]+" dependencyManagement/build.gradle.kts)
-
-          # conditional blocks not indented because of the heredoc
-          if [[ $VERSION == *.0 ]]; then
-          cat > /tmp/release-notes.txt << EOF
-          This release targets the OpenTelemetry SDK $sdk_version.
-
-          Note that many artifacts have the \`-alpha\` suffix attached to their version number, reflecting that they are still alpha quality and will continue to have breaking changes. Please see the [VERSIONING.md](https://github.com/open-telemetry/opentelemetry-java-instrumentation/blob/main/VERSIONING.md#opentelemetry-java-instrumentation-versioning) for more details.
-
-          EOF
-          else
-          cat > /tmp/release-notes.txt << EOF
-          This is a patch release on the previous $PRIOR_VERSION release, fixing the issue(s) below.
-
-          EOF
-          fi
-
           # CHANGELOG_SECTION.md is also used at the end of the release workflow
           # for copying the change log updates to main
           sed -n "0,/^## Version $VERSION /d;/^## Version /q;p" CHANGELOG.md \
@@ -159,7 +142,7 @@ jobs:
           # the complex perl regex is needed because markdown docs render newlines as soft wraps
           # while release notes render them as line breaks
           perl -0pe 's/(?<!\n)\n *(?!\n)(?![-*] )(?![1-9]+\. )/ /g' /tmp/CHANGELOG_SECTION.md \
-            >> /tmp/release-notes.txt
+            > /tmp/release-notes.txt
 
           # conditional block not indented because of the heredoc
           if [[ $VERSION == *.0 ]]; then