[#171] Remove unit tests from pipeline

Unit tests are included as pre-commit hook. They are
triggered by the change of .go files.

Signed-off-by: Alex Vanin <a.vanin@yadro.com>

.woodpecker/pre-commit.yml

@@ -9,9 +9,3 @@ pipeline:
     commands:
       - export HOME="$(getent passwd $(id -u) | cut '-d:' -f6)"
       - pre-commit run --hook-stage manual
-
-  unit:
-    image: git.frostfs.info/truecloudlab/frostfs-ci:v0.36
-    commands:
-      - export HOME="$(getent passwd $(id -u) | cut '-d:' -f6)"
-      - make test