gpg: use "gpg2" for 'git config --local gpg.program'

setup.py

@@ -9,7 +9,6 @@ setup(
     author_email='roman.zeyde@gmail.com',
     url='http://github.com/romanz/trezor-agent',
     packages=['trezor_agent', 'trezor_agent.gpg'],
-    scripts=['trezor_agent/gpg/trezor-git-gpg-wrapper.sh'],
     install_requires=['ecdsa>=0.13', 'ed25519>=1.4', 'Cython>=0.23.4', 'protobuf>=2.6.1', 'trezor>=0.6.12', 'semver>=2.2'],
     platforms=['POSIX'],
     classifiers=[

trezor_agent/gpg/README.md

@@ -48,7 +48,7 @@ $ gpg2 --verify EXAMPLE.asc                  # verify using standard GPG binary
 ## Git commit & tag signatures:
 Git can use GPG to sign and verify commits and tags (see [here](https://git-scm.com/book/en/v2/Git-Tools-Signing-Your-Work)):
 ```
-$ git config --local gpg.program "trezor-git-gpg-wrapper.sh"
+$ git config --local gpg.program "gpg2"
 $ git commit --gpg-sign                      # create GPG-signed commit
 $ git log --show-signature -1                # verify commit signature
 $ git tag --sign "TAG"                       # create GPG-signed tag

trezor_agent/gpg/trezor-git-gpg-wrapper.sh

@@ -1,7 +0,0 @@
-#!/bin/bash
-if [[ "$*" == *"--verify"* ]]
-then
-	gpg2 $*  # verify using GPG2 (for ECDSA and EdDSA keys)
-else
-	trezor-gpg sign -o-  # sign using TREZOR and write the signature to stdout
-fi