chore: add remove deploy

chore: lint

.github/workflows/on_branch_del.yml

+name: '[undeploy from OKD]'
+
+# only trigger on delete non master/staging branch
+on: 
+  delete:
+    branches:
+    - '!master'
+    - '!staging'
+
+jobs:
+  remove-deploy:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: action/checkout@v2
+    - name: 'Set env var'
+      run: |
+        echo "Using github.ref: $GITHUB_REF"
+        BRANCH_NAME=${GITHUB_REF#refs/heads/}
+        echo "BRANCH_NAME=$BRANCH_NAME" >> $GITHUB_ENV
+
+        echo "OKD_URL=https://okd-dev.hbp.eu:443" >> $GITHUB_ENV
+        echo "OKD_SECRET=${{ secrets.OKD_DEV_SECRET }}" >> $GITHUB_ENV
+        echo "OKD_PROJECT=interactive-atlas-viewer" >> $GITHUB_ENV
+        echo "Remove deploy from dev cluster..."
+
+    - name: 'Login via oc cli'
+      run: |
+        oc login $OKD_URL --token=$OKD_SECRET
+        oc project $OKD_PROJECT
+
+        # sanitized branchname == remove _ / and lowercase everything
+        SANITIZED_BRANCH_NAME=$(echo ${BRANCH_NAME//[_\/]/} | awk '{ print tolower($0) }')
+        echo "SANITIZED_BRANCH_NAME=$SANITIZED_BRANCH_NAME" >> $GITHUB_ENV
+        echo "Working branch name: $BRANCH_NAME, sanitized branch name: $SANITIZED_BRANCH_NAME"
+
+    - name: 'List and delete all labelled resoures'
+      run: |
+        oc get all \
+          -l template=siibra-explorer-branch-deploy-template \
+          -l app=siibra-explorer-branch-deploy-$SANITIZED_BRANCH_NAME
+
+        oc delete all \
+          -l template=siibra-explorer-branch-deploy-template \
+          -l app=siibra-explorer-branch-deploy-$SANITIZED_BRANCH_NAME

src/util/regDereg.base.ts

@@ -7,9 +7,9 @@ type TRegDeregConfig = {
  * a pattern which is observed very frequently
  */
 export class RegDereg<T, Y = void> {
-  constructor(){
 
-  }
+  // eslint-disable-next-line @typescript-eslint/no-empty-function
+  constructor(){}
   public allowDuplicate = false
   protected callbacks: ((allArg: T) => Y)[] = []
   register(fn: (allArg: T) => Y, config?: TRegDeregConfig) {