[#86] Remove GitHub workflow of image publishing

Signed-off-by: anastasia prasolova <anastasia@nspcc.ru>

.github/workflows/publish_to_dockerhub.yml

@@ -1,84 +0,0 @@
-name: Push images to DockerHub
-
-# Controls when the action will run.
-on:
-  push:
-    # Publish `master` as Docker `latest` and `git_revision` images.
-    branches:
-      - master
-  release:
-    # Publish released commit as Docker `latest` and `git_revision` images.
-    types:
-      - published
-
-  # Allows to run this workflow manually from the Actions tab.
-  workflow_dispatch:
-    inputs:
-      ref:
-        description: 'Ref to build Docker image [default: latest master; examples: v0.92.0, 0a4ff9d3e4a9ab432fd5812eb18c98e03b5a7432]'
-        required: false
-        default: ''
-      push_image:
-        description: 'Push image to DockerHub [default: false; examples: true, false]'
-        required: false
-        default: 'false'
-
-# A workflow run.
-jobs:
-  publish:
-    name: Publish image to DockerHub
-    runs-on: ubuntu-20.04
-    steps:
-      - name: Checkout (manual run)
-        if: ${{ github.event_name == 'workflow_dispatch' }}
-        uses: actions/checkout@v2
-        with:
-          ref: ${{ github.event.inputs.ref }}
-          # Allows to fetch all history for all branches and tags. Need this for proper versioning.
-          fetch-depth: 0
-
-      - name: Checkout (automatical run)
-        if: ${{ github.event_name != 'workflow_dispatch' }}
-        uses: actions/checkout@v2
-        with:
-          # Allows to fetch all history for all branches and tags. Need this for proper versioning.
-          fetch-depth: 0
-
-      - name: Set up Go
-        uses: actions/setup-go@v2
-        with:
-          go-version: 1.16
-
-      - name: Restore go modules from cache
-        uses: actions/cache@v2
-        with:
-          path: /home/runner/go/pkg/mod
-          key: deps-${{ hashFiles('go.sum') }}
-
-      - name: Update Go modules
-        run: make dep
-
-      - name: Build image
-        run: make image
-
-      - name: Build image with 'latest' tag
-        if: ${{ github.event_name == 'release' && github.event.release.target_commitish == 'master' }}
-        run: make image
-        env:
-          HUB_TAG: latest
-
-      - name: Login to DockerHub
-        uses: docker/login-action@v1
-        with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_PASSWORD }}
-
-      - name: Push image to registry
-        if: ${{ github.event_name == 'release' || (github.event_name == 'workflow_dispatch' && github.event.inputs.push_image == 'true') }}
-        run: make image-push
-
-      - name: Push image with 'latest' tag to registry
-        if: ${{ github.event_name == 'release' && github.event.release.target_commitish == 'master' }}
-        run: make image-push
-        env:
-          HUB_TAG: latest