Merge bitcoin/bitcoin#30908: doc: remove Eclipser fuzzing documentation

735436df8c Remove outdated Eclipser fuzzing documentation (Jon Atack)

Pull request description:

  Remove the Eclipser fuzzing documentation from `doc/fuzzing.md`, as that repository (https://github.com/SoftSec-KAIST/Eclipser) hasn't been updated in several years, appears possibly unmaintained, and likely isn't being actively used for fuzzing Bitcoin Core.

  These docs were originally added in https://github.com/bitcoin/bitcoin/pull/22585.

ACKs for top commit:
  maflcko:
    review ACK 735436df8c
  brunoerg:
    ACK 735436df8c

Tree-SHA512: 7ccbf93c10add53e92edf67a622722935029add63f8fbb6e733b96e9d155faeb8d5d3678adb0e7f2ce8ccbdffd2a34c3dc93adbcf4e3ce0cdd03e20ad3e6bbd6

doc/fuzzing.md

@@ -282,71 +282,6 @@ $ ./honggfuzz/honggfuzz --exit_upon_crash --quiet --timeout 4 -n 1 -Q \
                        -debug
 ```
 
-# Fuzzing Bitcoin Core using Eclipser (v1.x)
-
-## Quickstart guide
-
-To quickly get started fuzzing Bitcoin Core using [Eclipser v1.x](https://github.com/SoftSec-KAIST/Eclipser/tree/v1.x):
-
-```sh
-$ git clone https://github.com/bitcoin/bitcoin
-$ cd bitcoin/
-$ sudo vim /etc/apt/sources.list # Uncomment the lines starting with 'deb-src'.
-$ sudo apt-get update
-$ sudo apt-get build-dep qemu
-$ sudo apt-get install libtool libtool-bin wget automake autoconf bison gdb
-```
-
-At this point, you must install the .NET core.  The process differs, depending on your Linux distribution.
-See [this link](https://learn.microsoft.com/en-us/dotnet/core/install/linux) for details.
-On Ubuntu 20.04, the following should work:
-
-```sh
-$ wget -q https://packages.microsoft.com/config/ubuntu/20.04/packages-microsoft-prod.deb
-$ sudo dpkg -i packages-microsoft-prod.deb
-$ rm packages-microsoft-prod.deb
-$ sudo apt-get update
-$ sudo apt-get install -y dotnet-sdk-2.1
-```
-
-You will also want to make sure Python is installed as `python` for the Eclipser install to succeed.
-
-```sh
-$ git clone https://github.com/SoftSec-KAIST/Eclipser.git
-$ cd Eclipser
-$ git checkout v1.x
-$ make
-$ cd ..
-$ cmake -B build_fuzz -DBUILD_FOR_FUZZING=ON
-$ mkdir -p outputs/
-$ FUZZ=bech32 dotnet ./Eclipser/build/Eclipser.dll fuzz -p build_fuzz/src/test/fuzz/fuzz -t 36000 -o outputs --src stdin
-```
-
-This will perform 10 hours of fuzzing.
-
-To make further use of the inputs generated by Eclipser, you
-must first decode them:
-
-```sh
-$ dotnet Eclipser/build/Eclipser.dll decode -i outputs/testcase -o decoded_outputs
-```
-This will place raw inputs in the directory `decoded_outputs/decoded_stdins`.  Crashes are in the `outputs/crashes` directory, and must
-be decoded in the same way.
-
-Fuzzing with Eclipser will likely be much more effective if using an existing corpus:
-
-```sh
-$ git clone https://github.com/bitcoin-core/qa-assets
-$ FUZZ=bech32 dotnet Eclipser/build/Eclipser.dll fuzz -p build_fuzz/src/test/fuzz/fuzz -t 36000 -i qa-assets/fuzz_corpora/bech32 outputs --src stdin
-```
-
-Note that fuzzing with Eclipser on certain targets (those that create 'full nodes', e.g. `process_message*`) will,
-for now, slowly fill `/tmp/` with improperly cleaned-up files, which will cause spurious crashes.
-See [this proposed patch](https://github.com/bitcoin/bitcoin/pull/22472) for more information.
-
-Read the [Eclipser documentation for v1.x](https://github.com/SoftSec-KAIST/Eclipser/tree/v1.x) for more details on using Eclipser.
-
-
 # OSS-Fuzz
 
 Bitcoin Core participates in Google's [OSS-Fuzz](https://github.com/google/oss-fuzz/tree/master/projects/bitcoin-core)