doc: remove manual TOCs

doc/developer-notes.md

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 # Developer Notes
 
-<!-- markdown-toc start -->
-**Table of Contents**
-
-- [Developer Notes](#developer-notes)
-    - [Coding Style (General)](#coding-style-general)
-    - [Coding Style (C++)](#coding-style-c)
-    - [Coding Style (Python)](#coding-style-python)
-    - [Coding Style (Doxygen-compatible comments)](#coding-style-doxygen-compatible-comments)
-      - [Generating Documentation](#generating-documentation)
-    - [Development tips and tricks](#development-tips-and-tricks)
-        - [Compiling for debugging](#compiling-for-debugging)
-        - [Show sources in debugging](#show-sources-in-debugging)
-        - [`debug.log`](#debuglog)
-        - [Signet, testnet, and regtest modes](#signet-testnet-and-regtest-modes)
-        - [DEBUG_LOCKORDER](#debug_lockorder)
-        - [DEBUG_LOCKCONTENTION](#debug_lockcontention)
-        - [Valgrind suppressions file](#valgrind-suppressions-file)
-        - [Compiling for test coverage](#compiling-for-test-coverage)
-        - [Performance profiling with perf](#performance-profiling-with-perf)
-        - [Sanitizers](#sanitizers)
-    - [Locking/mutex usage notes](#lockingmutex-usage-notes)
-    - [Threads](#threads)
-    - [Ignoring IDE/editor files](#ignoring-ideeditor-files)
-- [Development guidelines](#development-guidelines)
-    - [General Bitcoin Core](#general-bitcoin-core)
-    - [Wallet](#wallet)
-    - [General C++](#general-c)
-    - [C++ data structures](#c-data-structures)
-    - [Strings and formatting](#strings-and-formatting)
-    - [Shadowing](#shadowing)
-    - [Lifetimebound](#lifetimebound)
-    - [Threads and synchronization](#threads-and-synchronization)
-    - [Scripts](#scripts)
-        - [Shebang](#shebang)
-    - [Source code organization](#source-code-organization)
-    - [GUI](#gui)
-    - [Subtrees](#subtrees)
-    - [Upgrading LevelDB](#upgrading-leveldb)
-      - [File Descriptor Counts](#file-descriptor-counts)
-      - [Consensus Compatibility](#consensus-compatibility)
-    - [Scripted diffs](#scripted-diffs)
-        - [Suggestions and examples](#suggestions-and-examples)
-    - [Release notes](#release-notes)
-    - [RPC interface guidelines](#rpc-interface-guidelines)
-    - [Internal interface guidelines](#internal-interface-guidelines)
-
-<!-- markdown-toc end -->
-
 ## Coding Style (General)
 
 Various coding styles have been used during the history of the codebase,