trim some redundant wording in git-repository(5)
diff --git a/got/git-repository.5 b/got/git-repository.5
index c53949e..433d6bb 100644
--- a/got/git-repository.5
+++ b/got/git-repository.5
@@ -79,8 +79,7 @@ Loose objects files are compressed with
Multiple objects can be bundled in a
.Em pack file
for better disk space efficiency and increased run-time performance.
-The pack file format knows two additional types of objects in addition
-to blobs, trees, and commits:
+The pack file format introduces two additional types of objects:
.Bl -tag -width Ds
.It Offset Delta Objects
This object is represented as a delta against another object in the