Delete the github folder from opencode and remove related functionality

opencode/packages/opencode/src/cli/cmd/tui/component/tips.tsx

@@ -114,10 +114,6 @@ const TIPS = [
   "Run {highlight}opencode upgrade{/highlight} to update to the latest version",
   "Run {highlight}opencode auth list{/highlight} to see all configured providers",
   "Run {highlight}opencode agent create{/highlight} for guided agent creation",
-  "Use {highlight}/opencode{/highlight} in GitHub issues/PRs to trigger AI actions",
-  "Run {highlight}opencode github install{/highlight} to set up the GitHub workflow",
-  "Comment {highlight}/opencode fix this{/highlight} on issues to auto-create PRs",
-  "Comment {highlight}/oc{/highlight} on PR code lines for targeted code reviews",
   'Use {highlight}"theme": "system"{/highlight} to match your terminal\'s colors',
   "Create JSON theme files in {highlight}.opencode/themes/{/highlight} directory",
   "Themes support dark/light variants for both modes",

opencode/packages/opencode/src/index.ts

@@ -16,7 +16,6 @@ import { ServeCommand } from "./cli/cmd/serve"
 import { DebugCommand } from "./cli/cmd/debug"
 import { StatsCommand } from "./cli/cmd/stats"
 import { McpCommand } from "./cli/cmd/mcp"
-import { GithubCommand } from "./cli/cmd/github"
 import { ExportCommand } from "./cli/cmd/export"
 import { ImportCommand } from "./cli/cmd/import"
 import { AttachCommand } from "./cli/cmd/tui/attach"
@@ -94,7 +93,6 @@ const cli = yargs(hideBin(process.argv))
   .command(StatsCommand)
   .command(ExportCommand)
   .command(ImportCommand)
-  .command(GithubCommand)
   .command(PrCommand)
   .command(SessionCommand)
   .fail((msg, err) => {