Remove dependency on picocli

build.gradle

@@ -73,7 +73,6 @@ allprojects {
         slf4jVersion = '1.7.32'
         logbackVersion = '1.2.9'
         junitVersion = '5.8.2'
-        picocliVersion = '4.6.2'
         sopJavaVersion = '1.1.0'
         rootConfigDir = new File(rootDir, 'config')
         gitCommit = getGitCommit()

pgpainless-cli/build.gradle

@@ -42,8 +42,6 @@ dependencies {
     implementation(project(":pgpainless-sop"))
     implementation "org.pgpainless:sop-java-picocli:$sopJavaVersion"
 
-    implementation "info.picocli:picocli:$picocliVersion"
-
     // https://mvnrepository.com/artifact/com.google.code.findbugs/jsr305
     implementation group: 'com.google.code.findbugs', name: 'jsr305', version: '3.0.2'
 }