grep: rip out support for external grep

We still allow people to pass --[no-]ext-grep on the command line,
but the option is ignored.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 0 insertions, 1 deletions

diff --git a/grep.h b/grep.h
index 75370f60d7..0c61b00cbf 100644
--- a/grep.h
+++ b/grep.h
@@ -85,7 +85,6 @@ struct grep_opt {
 	int max_depth;
 	int funcname;
 	char color_match[COLOR_MAXLEN];
-	const char *color_external;
 	int regflags;
 	unsigned pre_context;
 	unsigned post_context;