chore: Remove now-unnecessary "unreleased" API status

These have prevented links from appearing in README.md

The two APIs that are at 1.0.0-beta00 will still not appear, due to
their version.

apis/apis.json

@@ -382,7 +382,6 @@
     {
       "id": "Google.Cloud.BigQuery.DataExchange.V1Beta1",
       "version": "2.0.0-beta01",
-      "releaseLevelOverride": "unreleased",
       "type": "grpc",
       "productName": "Analytics Hub",
       "productUrl": "https://cloud.google.com/analytics-hub",
@@ -403,7 +402,6 @@
     {
       "id": "Google.Cloud.BigQuery.DataExchange.Common",
       "version": "2.0.0-beta01",
-      "releaseLevelOverride": "unreleased",
       "targetFrameworks": "netstandard2.1;net462",
       "type": "other",
       "noVersionHistory": true,
@@ -1943,7 +1941,6 @@
     {
       "id": "Google.Cloud.Logging.Console",
       "version": "1.0.0-beta01",
-      "releaseLevelOverride": "unreleased",
       "type": "other",
       "metadataType": "INTEGRATION",
       "targetFrameworks": "netstandard2.1",
@@ -2315,7 +2312,6 @@
     {
       "id": "Google.Cloud.Optimization.V1",
       "version": "2.0.0-beta01",
-      "releaseLevelOverride": "unreleased",
       "type": "grpc",
       "productName": "Cloud Optimization",
       "description": "Recommended Google client library to access the Cloud Optimization API, which provides a portfolio of solvers to address common optimization use cases starting with optimal route planning for vehicle fleets.",
@@ -2777,7 +2773,6 @@
     {
       "id": "Google.Cloud.Run.V2",
       "version": "2.0.0-beta01",
-      "releaseLevelOverride": "unreleased",
       "type": "grpc",
       "productName": "Cloud Run Admin",
       "productUrl": "https://cloud.google.com/run/docs",
@@ -3531,7 +3526,6 @@
     {
       "id": "Google.Cloud.Video.LiveStream.V1",
       "version": "1.0.0-beta00",
-      "releaseLevelOverride": "unreleased",
       "type": "grpc",
       "productName": "Live Stream",
       "productUrl": "https://cloud.google.com/livestream/docs/",
@@ -3552,7 +3546,6 @@
     {
       "id": "Google.Cloud.Video.Stitcher.V1",
       "version": "1.0.0-beta00",
-      "releaseLevelOverride": "unreleased",
       "type": "grpc",
       "productName": "Video Stitcher",
       "productUrl": "https://cloud.google.com/video-stitcher/docs",