Merge bitcoin/bitcoin#26598: contrib: remove builder keys

e6864fa contrib: remove builder keys (fanquake)

Pull request description:

  This has been superseded by adding a builder-keys/ directory in
  guix.sigs, where the presence of keys, and validity of signatures
  is checked. Preventing issues like missing keys or invalid signatures.

  New (or exisiting) Guix builders can add their key in the next PR
  they open adding attestations.

  Related to issues like #26566, #26563.

  Also follows up with the comment here: bitcoin/bitcoin#26565 (comment).

ACKs for top commit:
  hebasto:
    ACK e6864fa, modulo s/update/remove/ in the PR tittle.

Tree-SHA512: 095b4cf12ed0baeaf0ee7b8edcb3e2647e9c0f812e8fd63915ddb454f81dacc9c2d2b409de2773b7adb5ff643893d614d8aad1bc44c26da648e1bbbe19e11e05

Author: MarcoFalke

contrib/README.md

@@ -26,9 +26,6 @@ The [Debian](/contrib/debian) subfolder contains the copyright file.
 
 All other packaging related files can be found in the [bitcoin-core/packaging](https://github.com/bitcoin-core/packaging) repository.
 
-### [Builder keys](/contrib/builder-keys)
-PGP keys used for signing Bitcoin Core [release](/doc/release-process.md) results.
-
 ### [MacDeploy](/contrib/macdeploy) ###
 Scripts and notes for Mac builds.
 

contrib/builder-keys/README.md

@@ -134,7 +134,6 @@ Follow the relevant Guix README.md sections:
 
 ### Verify other builders' signatures to your own (optional)
 
-- [Add other builders keys to your gpg keyring, and/or refresh keys](/contrib/builder-keys/README.md)
 - [Verifying build output attestations](/contrib/guix/README.md#verifying-build-output-attestations)
 
 ### Commit your non codesigned signature to guix.sigs
@@ -193,7 +192,6 @@ popd
 
 ### Verify other builders' signatures to your own (optional)
 
-- [Add other builders keys to your gpg keyring, and/or refresh keys](/contrib/builder-keys/README.md)
 - [Verifying build output attestations](/contrib/guix/README.md#verifying-build-output-attestations)
 
 ### Commit your codesigned signature to guix.sigs (for the signed macOS/Windows binaries)

contrib/builder-keys/keys.txt

@@ -12,7 +12,7 @@
 from subprocess import check_output, STDOUT, CalledProcessError
 
 IGNORE_WORDS_FILE = 'test/lint/spelling.ignore-words.txt'
-FILES_ARGS = ['git', 'ls-files', '--', ":(exclude)build-aux/m4/", ":(exclude)contrib/seeds/*.txt", ":(exclude)depends/", ":(exclude)doc/release-notes/", ":(exclude)src/leveldb/", ":(exclude)src/crc32c/", ":(exclude)src/qt/locale/", ":(exclude)src/qt/*.qrc", ":(exclude)src/secp256k1/", ":(exclude)src/minisketch/", ":(exclude)contrib/builder-keys/keys.txt", ":(exclude)contrib/guix/patches"]
+FILES_ARGS = ['git', 'ls-files', '--', ":(exclude)build-aux/m4/", ":(exclude)contrib/seeds/*.txt", ":(exclude)depends/", ":(exclude)doc/release-notes/", ":(exclude)src/leveldb/", ":(exclude)src/crc32c/", ":(exclude)src/qt/locale/", ":(exclude)src/qt/*.qrc", ":(exclude)src/secp256k1/", ":(exclude)src/minisketch/", ":(exclude)contrib/guix/patches"]
 
 
 def check_codespell_install():