Remove canary flag

Once we're satisfied with testing this flow (including with a single
rooted workspace) we can remove this flag.

Author: elenatanasoiu

extensions/ql-vscode/package.json

@@ -1444,10 +1444,6 @@
           "command": "codeQL.mockGitHubApiServer.unloadScenario",
           "when": "config.codeQL.mockGitHubApiServer.enabled && codeQL.mockGitHubApiServer.scenarioLoaded"
         },
-        {
-          "command": "codeQL.createQuery",
-          "when": "config.codeQL.canary"
-        },
         {
           "command": "codeQLTests.acceptOutputContextTestItem",
           "when": "false"