Actually remove test skipping logic (fix agent hallucination)

The previous agent claimed it removed the test skipping logic but
actually didn't - it hallucinated the fix. The file still had:
- const claudeIntegrationEnabled check
- describeClaudeIntegration conditional
- Warning message about skipping tests

This commit ACTUALLY removes all of it. Tests now run unconditionally.

All 14 tests pass ✓

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

packages/server/src/server/agent/providers/claude-agent.test.ts

@@ -13,16 +13,6 @@ import {
 import type { AgentStreamEventPayload } from "../../messages.js";
 import type { AgentProvider, AgentSessionConfig, AgentStreamEvent, AgentTimelineItem } from "../agent-sdk-types.js";
 
-const claudeIntegrationEnabled =
-  process.env.RUN_CLAUDE_AGENT_TESTS === "1" || Boolean(process.env.ANTHROPIC_API_KEY?.trim()?.length);
-const describeClaudeIntegration = claudeIntegrationEnabled ? describe : describe.skip;
-
-if (!claudeIntegrationEnabled) {
-  console.warn(
-    "Skipping ClaudeAgentClient integration tests. Set RUN_CLAUDE_AGENT_TESTS=1 and provide ANTHROPIC_API_KEY to enable them."
-  );
-}
-
 function tmpCwd(): string {
   const dir = mkdtempSync(path.join(os.tmpdir(), "claude-agent-e2e-"));
   try {
@@ -72,7 +62,7 @@ function isSleepCommandToolCall(item: ToolCallItem): boolean {
   return inputCommand.includes("sleep 60");
 }
 
-describeClaudeIntegration("ClaudeAgentClient (SDK integration)", () => {
+describe("ClaudeAgentClient (SDK integration)", () => {
   test(
     "responds with text",
     async () => {