Revert "Revert "Revert git blame handling (#746)""

This reverts commit 8886648.

Cargo.toml

@@ -15,8 +15,6 @@ name = "delta"
 path = "src/main.rs"
 
 [dependencies]
-chrono = "0.4.19"
-chrono-humanize = "0.2.1"
 ansi_colours = "1.0.4"
 ansi_term = "0.12.1"
 atty = "0.2.14"

src/delta.rs

@@ -22,7 +22,6 @@ pub enum State {
     HunkPlus(Option<String>), // In hunk; added line (raw_line)
     SubmoduleLog, // In a submodule section, with gitconfig diff.submodule = log
     SubmoduleShort(String), // In a submodule section, with gitconfig diff.submodule = short
-    Blame(String), // In a line of `git blame` output.
     Unknown,
     // The following elements are created when a line is wrapped to display it:
     HunkZeroWrapped,  // Wrapped unchanged line
@@ -120,7 +119,6 @@ impl<'a> StateMachine<'a> {
                 || self.handle_submodule_log_line()?
                 || self.handle_submodule_short_line()?
                 || self.handle_hunk_line()?
-                || self.handle_blame_line()?
                 || self.should_skip_line()
                 || self.emit_line_unchanged()?;
         }

src/handlers/mod.rs

@@ -1,6 +1,5 @@
 /// This module contains functions handling input lines encountered during the
 /// main `StateMachine::consume()` loop.
-pub mod blame;
 pub mod commit_meta;
 pub mod diff_stat;
 pub mod draw;

src/paint.rs

@@ -468,7 +468,6 @@ impl<'a> Painter<'a> {
                     (config.plus_style, config.plus_non_emph_style)
                 }
             }
-            State::Blame(_) => (diff_sections[0].0, diff_sections[0].0),
             _ => (config.null_style, config.null_style),
         };
         let fill_style = if style_sections_contain_more_than_one_style(diff_sections) {
@@ -622,7 +621,6 @@ impl<'a> Painter<'a> {
             }
             State::HunkHeader(_, _) => true,
             State::HunkMinus(Some(_)) | State::HunkPlus(Some(_)) => false,
-            State::Blame(_) => true,
             _ => panic!(
                 "should_compute_syntax_highlighting is undefined for state {:?}",
                 state