docs: remove H1 on pages where frontmatter + summary already cover the parenthetical

docs/tools/browser-linux-troubleshooting.md

@@ -4,8 +4,6 @@ read_when: "Browser control fails on Linux, especially with snap Chromium"
 title: "Browser troubleshooting"
 ---
 
-# Browser Troubleshooting (Linux)
-
 ## Problem: "Failed to start Chrome CDP on port 18800"
 
 OpenClaw's browser control server fails to launch Chrome/Brave/Edge/Chromium with the error:

docs/tools/skills.md

@@ -6,8 +6,6 @@ read_when:
 title: "Skills"
 ---
 
-# Skills (OpenClaw)
-
 OpenClaw uses **[AgentSkills](https://agentskills.io)-compatible** skill folders to teach the agent how to use tools. Each skill is a directory containing a `SKILL.md` with YAML frontmatter and instructions. OpenClaw loads **bundled skills** plus optional local overrides, and filters them at load time based on environment, config, and binary presence.
 
 ## Locations and precedence

docs/tools/thinking.md

@@ -5,8 +5,6 @@ read_when:
 title: "Thinking levels"
 ---
 
-# Thinking Levels (/think directives)
-
 ## What it does
 
 - Inline directive in any inbound body: `/t <level>`, `/think:<level>`, or `/thinking <level>`.

docs/tools/tts.md

@@ -7,8 +7,6 @@ read_when:
 title: "Text-to-speech"
 ---
 
-# Text-to-speech (TTS)
-
 OpenClaw can convert outbound replies into audio using ElevenLabs, Google Gemini, Microsoft, MiniMax, OpenAI, or xAI.
 It works anywhere OpenClaw can send audio.