Remove deprecated command line flags (#1110)

Those have been made obsolete by the dedicated filter

Change: rm-author-flag

Author: christian-schilling

src/bin/josh-filter.rs

@@ -45,16 +45,6 @@ fn make_app() -> clap::Command {
                 .help("Produce a history that contains only commits listed in the given file")
                 .long("squash-file")
         )
-        .arg(
-            clap::Arg::new("author")
-                .help("Author to use for commits with rewritten message")
-                .long("author")
-        )
-        .arg(
-            clap::Arg::new("email")
-                .help("Author email to use for commits with rewritten message")
-                .long("email")
-        )
         .arg(
             clap::Arg::new("single")
                 .action(clap::ArgAction::SetTrue)

tests/filter/squash.t

@@ -28,7 +28,7 @@
 
   $ git merge -q branch2 --no-ff
 
-  $ josh-filter -s --squash-pattern "refs/tags/*" --author "New Author" --email "new@e.mail" --update refs/heads/filtered
+  $ josh-filter -s --squash-pattern "refs/tags/*" --update refs/heads/filtered
   Warning: reference refs/heads/filtered wasn't updated
   [1] :squash(