ci: remove gh action gosec linter,since it is already part of golangci

This commit removes gosec standalone linter and related parts,
since golangci linter runs gosec linter too.

Signed-off-by: Rakshith R <rar@redhat.com>

.github/workflows/gosec.yaml

@@ -1,15 +0,0 @@
----
-name: gosec
-# yamllint disable-line rule:truthy
-on:
-  pull_request:
-    branches:
-      - '*'
-jobs:
-  gosec:
-    name: gosec
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2
-      - name: gosec
-        run: CONTAINER_CMD=docker make containerized-test TARGET=gosec