Remove git_only flags from release-plz config (#1228)

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: kixelated

.release-plz.toml

@@ -2,10 +2,3 @@
 dependencies_update = true
 git_release_enable = false
 
-[[package]]
-name = "libmoq"
-git_only = true
-
-[[package]]
-name = "moq-ffi"
-git_only = true