Merge bitcoin/bitcoin#30257: build: Remove --enable-gprof

fa780e1c25 build: Remove --enable-gprof (MarcoFalke)

Pull request description:

  It is unclear what benefit this option has, given that:

  * `gprof` requires re-compilation (`perf` and other tools can instead be used on existing executables)
  * `gprof` requires hardening to be disabled
  * `gprof` doesn't work with `clang`
  * `perf` is documented in the dev-notes, and test notes, and embedded into the functional test framework; `gprof` isn't
  * Anyone really wanting to use it could pass the required flags to `./configure`
  * I couldn't find any mention of the use of `gprof` in the discussions in this repo, apart from the initial pull request adding it (cfaac2a60f)
  * Keeping it means that it needs to be maintained and ported to CMake

  Fix all issues by removing it.

ACKs for top commit:
  TheCharlatan:
    ACK fa780e1c25
  hebasto:
    ACK fa780e1c25, I have reviewed the code and it looks OK.
  willcl-ark:
    crACK fa780e1c25

Tree-SHA512: 0a9ff363ac2bec8b743878a4e3147f18bc16823d00c5007568432c36320bd0199b13b6d0ce828a9a83c2cc434c058afaa64eb2eccfbd93ed85b81ce10c41760c

doc/developer-notes.md

@@ -13,7 +13,6 @@ Developer Notes
     - [Development tips and tricks](#development-tips-and-tricks)
         - [Compiling for debugging](#compiling-for-debugging)
         - [Show sources in debugging](#show-sources-in-debugging)
-        - [Compiling for gprof profiling](#compiling-for-gprof-profiling)
         - [`debug.log`](#debuglog)
         - [Signet, testnet, and regtest modes](#signet-testnet-and-regtest-modes)
         - [DEBUG_LOCKORDER](#debug_lockorder)
@@ -386,10 +385,6 @@ ln -s /path/to/project/root/src src
 
 3. Use `debugedit` to modify debug information in the binary.
 
-### Compiling for gprof profiling
-
-Run configure with the `--enable-gprof` option, then make.
-
 ### `debug.log`
 
 If the code is behaving strangely, take a look in the `debug.log` file in the data directory;